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If We Could Travel Into The Past, It's Mind-boggling What Would Be Possible. For One Thing, History Would Become An Experimental Science, Which It Certainly Isn't Today. The Possible Insights Into Our Own Past And Nature And Origins Would Be Dazzling. For Another, We Would Be Facing The Deep Paradoxes Of Interfering With The Scheme Of Causality That Has Led To Our Own Time And Ourselves. I Have No Idea Whether It's Possible, But It's Certainly Worth Exploring.

-Carl Sagan

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If We Could Travel

Carl Sagan

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If We Could Travel Into The Past, It's Mind-boggling What Would Be Possible. For One Thing, History Would Become An Experimental Science, Which It Certainly Isn't Today. The Possible Insights Into Our Own Past And Nature And Origins Would Be Dazzling. For Another, We Would Be Facing The Deep Paradoxes Of Interfering With The Scheme Of Causality That Has Led To Our Own Time And Ourselves. I Have No Idea Whether It's Possible, But It's Certainly Worth Exploring.

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You Have To Know The Past To Understand The Present.

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The Simplest Thought, Like The Concept Of The Number One, Has An Elaborate Logical Underpinning.

It Is Of Interest To Note That While Some Dolphins Are Reported To Have Learned English - Up To Fifty Words Used In Correct Context - No Human Being Has Been Reported To Have Learned Dolphinese.

We Are, In A Way, Temporary Ambulatory Repositories For Our Nucleic Acids. This Does Not Deny Our Humanity; It Does Not Prevent Us From Pursuing The Good, The True And The Beautiful. But It Would Be A Great Mistake To Ignore Where We Have Come From In Our Attempt To Determine Where We Are Going.

It Is The Tension Between Creativity And Skepticism That Has Produced The Stunning And Unexpected Findings Of Science.

Looking At Fires When High, By The Way, Especially Through One Of Those Prism Kaleidoscopes Which Image Their Surroundings, Is An Extraordinarily Moving And Beautiful Experience.

Frederick Douglas Taught That Literacy Is The Path From Slavery To Freedom. There Are Many Kinds Of Slavery And Many Kinds Of Freedom, But Reading Is Still The Path.

When Permitted To Listen To Alternative Opinions And Engage In Substantive Debate, People Have Been Known To Change Their Minds. It Can Happen.

When You Make The Finding Yourself - Even If You're The Last Person On Earth To See The Light - You'll Never Forget It.

You Mean Am I For It Or Against It? You Think This Is A Key Question I'm Going To Be Asked On Vega, And You Want To Make Sure I Give The Right Answer? Okay. Overpopulation Is Why I'm In Favor Of Homosexuality And A Celibate Clergy. A Celibate Clergy Is An Especially Good Idea, Because It Tends To Suppress Any Hereditary Propensity Toward Fanaticism.

We Are The Universe Experiencing Itself.

We Are Not Smart Enough To Decide Which Pieces Of Knowledge Are Permissible And Which Are Not.

My Long-time View About Christianity Is That It Represents An Amalgam Of Two Seemingly Immiscible Parts-the Religion Of Jesus And The Religion Of Paul. Thomas Jefferson Attempted To Excise The Pauline Parts Of The New Testament. There Wasn't Much Left When He Was Done, But It Was An Inspiring Document.

.. Think Of The Rivers Of Blood Spilled By All Those Generals And Emperors So That In Glory And In Triumph They Could Become The 'momentary' Masters Of A 'fraction' Of A 'dot'

Extraordinary Claims Demand Extraordinary Evidence

That We Can Now Think Of No Mechanism For Astrology Is Relevant But Unconvincing. No Mechanism Was Known, For Example, For Continental Drift When It Was Proposed By Wegener. Nevertheless, We See That Wegener Was Right, And Those Who Objected On The Grounds Of Unavailable Mechanism Were Wrong.

Present Global Culture Is A Kind Of Arrogant Newcomer. It Arrives On The Planetary Stage Following Four And A Half Billion Years Of Other Acts, And After Looking About For A Few Thousand Years Declares Itself In Possession Of Eternal Truths. But In A World That Is Changing As Fast As Ours, This Is A Prescription For Disaster. No Nation, No Religion, No Economic System, No Body Of Knowledge, Is Likely To Have All The Answers For Our Survival. There Must Be Many Social Systems That Would Work Far Better Than Any Now In Existence. In The Scientific Tradition, Our Task Is To Find Them.

We Are Made Of Star Stuff. For The Most Part, Atoms Heavier Than Hydrogen Were Created In The Interiors Of Stars And Then Expelled Into Space To Be Incorporated Into Later Stars. The Sun Is Probably A Third Generation Star.

The Bill Of Rights Decoupled Religion From The State, In Part Because So Many Religions Were Steeped In An Absolutist Frame Of Mind - Each Convinced That It Alone Had A Monopoly On The Truth And Therefore Eager For The State To Impose This Truth On Others.

The Surface Of The Earth Is The Shore Of The Cosmic Ocean. From It We Have Learned Most Of What We Know. Recently, We Have Waded A Little Out To Sea, Enough To Dampen Our Toes Or, At Most, Wet Our Ankles. The Water Seems Inviting. The Ocean Calls.

Human History Can Be Viewed As A Slowly Dawning Awareness That We Are Members Of A Larger Group Groups Of People From Divergent Ethnic And Cultural Backgrounds Working In Some Sense Together [is] Surely A Humanizing And Character Building Experience. If We Are To Survive, Our Loyalties Must Be Broadened Further, To Include The Whole Human Community, The Entire Planet Earth.

Goddard Represented A Unique Combination Of Visionary Dedication And Technological Brilliance. He Studied Physics Because He Needed Physics To Get To Mars. In Reading The Notebooks Of Robert Goddard, I Am Struck By How Powerful His Exploratory And Scientific Motivations Were - And How Influental Speculative Ideas, Even Erroneous Ones, Can Be On The Shaping Of The Future.

Whatever The Reason You're On Mars, I'm Glad You're There, And I Wish I Was With You.

The Cosmic Calendar Compresses The Local History Of The Universe Into A Single Year. If The Universe Began On January 1st It Was Not Until May That The Milky Way Formed. Other Planetary Systems May Have Appeared In June, July And August, But Our Sun And Earth Not Until Mid-september. Life Arose Soon After. We Humans Appear On The Cosmic Calendar So Recently That Our Recorded History Occupies Only The Last Few Seconds Of The Last Minute Of December 31st.

The Desire To Be Connected With The Cosmos Reflects A Profound Reality, But We Are Connected; Not In The Trivial Ways That Astrology Promises, But In The Deepest Ways.

Recent Research Shows That Many Children Without Enough To Eat Wind Up With Diminished Capacity To Understand And Learn (“cognitive Impairment” ). Children Don't Have To Be Starving For This To Happen. Even Mild Undernourishment — The Kind Most Common Among Poor People In America — Can Do It.

If We Teach Only The Findings And Products Of Science - No Matter How Useful And Even Inspiring They May Be - Without Communicating Its Critical Method, How Can The Average Person Possibly Distinguish Science From Pseudoscience?

Thus The Recent Rapid Evolution Of Human Intelligence Is Not Only The Cause Of But Also The Only Conceivable Solution To The Many Serious Problems That Beset Us.

There Is Much That Science Doesn't Understand, Many Mysteries Still To Be Resolved. In A Universe Tens Of Billions Of Light-years Across And Some Ten Or Fifteen Billion Years Old, This May Be The Case Forever. We Are Constantly Stumbling On New Surprises

Science Is Far From A Perfect Instrument Of Knowledge. It's Just The Best We Have.

It Goes With A Courageous Intent To Greet The Universe As It Really Is, Not To Foist Our Emotional Predispositions On It But To Courageously Accept What Our Explorations Tell Us.

We Seem, These Days, Much More Willing To Recognize The Perils Before Us Than We Were Even A Decade Ago. The Newly Recognized Dangers Threaten All Of Us, Equally. No One Can Say How It Will Turn Out Down Here. But This Is Also, We May Note, The First Time That A Species Has Become Able To Journey To The Planets And The Stars. Sailors On A Becalmed Sea, We Sense A Stirring Of The Breeze.

You Can't Convince A Believer Of Anything; For Their Belief Is Not Based On Evidence, It's Based On A Deep Seated Need To Believe

Chlorine Is A Deadly Poison Gas Employed On European Battlefields In World War I. Sodium Is A Corrosive Metal Which Burns Upon Contact With Water. Together They Make A Placid And Unpoisonous Material, Table Salt. Why Each Of These Substances Has The Properties It Does Is A Subject Called Chemistry.

For Years I've Been Stressing With Regard To Ufos That Extraordinary Claims Require Extraordinary Evidence.

Our Perceptions Are Fallible. We Sometimes See What Isn't There. We Are Prey To Optical Illusions. Occasionally We Hallucinate. We Are Error-prone.

Optical Illusions

Every One Of Us Is, In The Cosmic Perspective, Precious. If A Human Disagrees With You, Let Him Live. In A Hundred Billion Galaxies, You Will Not Find Another.

Better The Hard Truth, I Say, Than The Comforting Fantasy. And In The Final Tolling It Often Turns Out That The Facts Are More Comforting Than The Fantasy.

The Cosmos Is All That Is Or Was Or Ever Will Be. Our Feeblest Contemplations Of The Cosmos Stir Us -- There Is A Tingling In The Spine, A Catch In The Voice, A Faint Sensation, As If A Distant Memory, Of Falling From A Height. We Know We Are Approaching The Greatest Of Mysteries.

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Extinction Is The Rule. Survival Is The Exception.

Mass Extinction

Exception To The Rule

These Days There Seems To Be Nowhere Left To Explore, At Least On The Land Area Of The Earth. Victims Of Their Very Success, The Explorers Now Pretty Much Stay Home.

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Imagine A Room Awash In Gasoline, And There Are Two Implacable Enemies In That Room. One Of Them Has Nine Thousand Matches. The Other Has Seven Thousand Matches. Each Of Them Is Concerned About Who's Ahead, Who's Stronger. Well That's The Kind Of Situation We Are Actually In. The Amount Of Weapons That Are Available To The United States And The Soviet Union Are So Bloated, So Grossly In Excess Of What's Needed To Dissuade The Other, That If It Weren't So Tragic, It Would Be Laughable. What Is Necessary Is To Reduce The Matches And To Clean Up The Gasoline.

Who Are We, If Not Measured By Our Impact On Others?

After I Give Lectures-on Almost Any Subject-i Am Often Asked, "do You Believe In Ufos?" I'm Always Struck By How The Question Is Phrased, The Suggestion That This Is A Matter Of Belief And Not Evidence. I'm Almost Never Asked, "how Good Is The Evidence That Ufos Are Alien Spaceships?"

What's The Harm Of A Little Mystification? It Sure Beats Boring Statistical Analyses.

In The Deepest Sense The Search For Extraterrestrial Intelligence Is A Search For Ourselves.

Extraterrestrial

Humans — Who Enslave, Castrate, Experiment On, And Fillet Other Animals — Have Had An Understandable Penchant For Pretending Animals Do Not Feel Pain. A Sharp Distinction Between Humans And 'animals' Is Essential If We Are To Bend Them To Our Will, Make Them Work For Us, Wear Them, Eat Them — Without Any Disquieting Tinges Of Guilt Or Regret. It Is Unseemly Of Us, Who Often Behave So Unfeelingly Toward Other Animals, To Contend That Only Humans Can Suffer. The Behavior Of Other Animals Renders Such Pretensions Specious. They Are Just Too Much Like Us.

Those With The Courage To Explore The Weave And Structure Of The Cosmos, Even Where It Differs Profoundly From Their Wishes And Prejudices, Will Penetrate Its Deepest Mysteries.

It's A Lazy Saturday Afternoon, There's A Couple Lying Naked In Bed Reading Encyclopediea Brittannica To Each Other, And Arguing About Whether The Andromeda Galaxy Is More 'numinous' Than The Ressurection. Do They Know How To Have A Good Time, Or Don't They?

In The Vastness Of The Cosmos There Must Be Other Civilizations Far Older And More Advanced Than Ours.

There Are No Forbidden Questions In Science, No Matters Too Sensitive Or Delicate To Be Probed, No Sacred Truths.

We Live On A Hunk Of Rock And Metal That Circles A Humdrum Star That Is One Of 400 Billion Other Stars That Make Up The Milky Way Galaxy Which Is One Of Billions Of Other Galaxies Which Make Up A Universe Which May Be One Of A Very Large Number, Perhaps An Infinite Number, Of Other Universes. That Is A Perspective On Human Life And Our Culture That Is Well Worth Pondering.

We Are Made Of Stellar Ash. Our Origin And Evolution Have Been Tied To Distant Cosmic Events. The Exploration Of The Cosmos Is A Voyage Of Self-discovery.

Religions Are Tough. Either They Make No Contentions Which Are Subject To Disproof Or They Quickly Redesign Doctrine After Disproof. ... Near The Core Of The Religious Experience Is Something Remarkably Resistant To Rational Inquiry.

The Open Road Still Softly Calls, Like A Nearly Forgotten Song Of Childhood

There Are Huge Advertising Budgets Only When There's No Difference Between The Products. If The Products Really Were Different, People Would Buy The One That's Better. Advertising Teaches People Not To Trust Their Judgment. Advertising Teaches People To Be Stupid.

If You Are Only Skeptical, Then No New Ideas Make It Through To You. You Become A Crotchety Old Person Convinced That Nonsense Is Ruling The World. (there Is, Of Course, Much Data To Support You.) But Every Now And Then, A New Idea Turns Out To Be On The Mark, Valid And Wonderful. If You Are Too Much In The Habit Of Being Skeptical About Everything, You Are Going To Miss Or Resent It, And Either Way You Will Be Standing In The Way Of Understanding And Progress.

I Never Said It. Honest. Oh, I Said There Are Maybe 100 Billion Galaxies And 10 Billion Trillion Stars. It's Hard To Talk About The Cosmos Without Using Big Numbers. I Said "billion" Many Times On The Cosmos Television Series, Which Was Seen By A Great Many People. But I Never Said "billions And Billions." For One Thing, It's Too Imprecise. How Many Billions Are "billions And Billions"? A Few Billion? Twenty Billion? A Hundred Billion? "billions And Billions" Is Pretty Vague. When We Reconfigured And Updated The Series, I Checked-and Sure Enough, I Never Said It.

Modern Science Has Been A Voyage Into The Unknown, With A Lesson In Humility Waiting At Every Stop. Many Passengers Would Rather Have Stayed Home.

It Is Clear That The Nations Of The World Now Can Only Rise And Fall Together. It Is Not A Question Of One Nation Winning At The Expense Of Another. We Must All Help One Another Or All Perish Together.

We've Arranged A Civilization In Which Most Crucial Elements Profoundly Depend On Science And Technology.

Ours Is The First Generation That Has Grown Up With Science-fiction Ideas.

We Are Star Stuff Which Has Taken Its Destiny Into Its Own Hands. The Loom Of Time And Space Works The Most Astonishing Transformations Of Matter.

The Cure For A Fallacious Argument Is A Better Argument, Not The Suppression Of Ideas.

A Book Is Made From A Tree. It Is An Assemblage Of Flat, Flexible Parts (still Called "leaves") Imprinted With Dark Pigmented Squiggles. One Glance At It And You Hear The Voice Of Another Person, Perhaps Someone Dead For Thousands Of Years. Across The Millennia, The Author Is Speaking, Clearly And Silently, Inside Your Head, Directly To You. Writing Is Perhaps The Greatest Of Human Inventions, Binding Together People, Citizens Of Distant Epochs, Who Never Knew One Another. Books Break The Shackles Of Time ― Proof That Humans Can Work Magic.

The Old Appeals To Racial, Sexual And Religious Chauvinism To Rabid Nationalist Fervor, Are Beginning Not To Work.

I Set Before You Two Ways: You Can Use Your Technology To Destroy Yourselves Or To Carry You To The Planets And The Stars. It's Up To You.

It Does No Harm To The Romance Of The Sunset To Know A Little Bit About It.

Absolute Certainty Will Always Elude Us. We Will Always Be Mired In Error. The Most Each Generation Can Hope For Is To Reduce The Error. . . .

The Candle Flame Gutters. Its Little Pool Of Light Trembles. Darkness Gathers. The Demons Begin To Stir.

If You Want To Make A [rhubarb] Pie From Scratch, First You Have To Create The Universe.

There Is A Report That Says That Kids Who Watch Violent Tv Programs Tend To Be More Violent When They Grow Up. But Did The Tv Cause The Violence, Or Do Violent Children Preferentially Enjoy Watching Violent Programs?

The Words "question" And "quest" Are Cognates. Only Through Inquiry Can We Discover Truth.

Writing A Novel Is Like Trying To Solve A Very Long Mathematical Equation. Changing Anything Can Change Everything Else.

Mathematical Equations

Clutching Our Crystals And Religiously Consulting Our Horoscopes, Our Critical Faculties In Steep Decline, Unable To Distinguish Between What's True And What Feels Good, We Slide, Almost Without Noticing, Into Superstition And Darkness.

Centuries Hence, When Current Social And Political Problems May Seem As Remote As The Problems Of The Thirty Years' War Are To Us, Our Age May Be Remembered Chiefly For One Fact: It Was The Time When The Inhabitants Of The Earth First Made Contact With The Vast Cosmos In Which Their Small Planet Is Embedded.

He Sought A Way To Preserve The Past. John Hershel Was One Of The Founders Of A New Form Of Time Travel.... A Means To Capture Light And Memories. He Actually Coined A Word For It... Photography. When You Think About It, Photography Is A Form Of Time Travel. This Man Is Staring At Us From Across The Centuries, A Ghost Preserved By Light.

The Claim Is Also Sometimes Made That Science Is As Arbitrary Or Irrational As All Other Claims To Knowledge, Or That Reason Itself Is An Illusion. As Ethan Allen Said Those Who Invalidate Reason Ought Seriously To Consider Whether They Argue Against Reason With Or Without Reason; If With Reason, Then They Establish The Principle That They Are Labouring To Dethrone. If They Argue Without Reason, Which They Must Do, In Order To Be Consistent With Themselves, They Are Out Of Reach Of Rational Conviction, Nor Do They Deserve A Rational Argument.

One Of The Great Commandments Of Science Is: 'mistrust Arguments From Authority.'

You Can Get Into A Habit Of Thought In Which You Enjoy Making Fun Of All Those Other People Who Don't See Things As Clearly As You Do. We Have To Guard Carefully Against It.

All Inquiries Carry With Them Some Element Of Risk.

There Are Many Hypotheses In Physics Of Almost Comparable Brillance And Elegance That Have Been Rejected Because They Did Not Survive Such A Confrontation With Experiment. In My View, The Human Condition Would Be Greatly Improved If Such Confrontations And Willingness To Reject Hypotheses Were A Regular Part Of Our Social, Political, Economic, Religious And Cultural Lives.

The Fact Is That Far More Crime And Child Abuse Has Been Committed By Zealots In The Name Of God, Jesus And Mohammed Than Has Ever Been Committed In The Name Of Satan. Many People Don’t Like That Statement, But Few Can Argue With It.

The Surface Of The Earth Is The Shore Of The Cosmic Ocean.

The Total Number Of Stars In The Universe Is Larger Than All The Grains Of Sand On All The Beaches Of The Planet Earth.

We Can Always Take But Never Give.

I Have A Foreboding Of An America In My Children's Or Grandchildren's Time - [...] When Awesome Technological Powers Are In The Hands Of A Very Few, And No One Representing The Public Interest Can Even Grasp The Issues; When The People Have Lost The Ability To Set Their Own Agendas Or Knowledgeably Question Those In Authority; When, Clutching Our Crystals And Nervously Consulting Our Horoscopes, Our Critical Faculties In Decline, Unable To Distinguish Between What Feels Good And What’s True, We Slide, Almost Without Noticing, Back Into Superstition And Darkness.

The Suppression Of Uncomfortable Ideas May Be Common In Religion Or In Politics, But It Is Not The Path To Knowledge; It Has No In The Endeavor Of Science. We Do Not Know In Advance Who Will Discover Fundamental Insights.

Life Is But A Momentary Glimpse Of The Wonder Of This Astonishing Universe, And It Is Sad To See So Many Dreaming It Away On Spiritual Fantasy.

Because Men, Compared To Male Chimps, Have Such Relatively Small Testicles (large Testicles Indicate A Species Where Many Males Mate, One After The Other, With The Same Female), We Might Guess That Promiscuous Societies Were Uncommon In The Immediate Human Past.

Some 5 Billion Years From Now, There Will Be A Last Perfect Day On Earth... Then The Sun Will Begin To Die, Life Will Be Extinguished, The Oceans Will Boil And Evaporate Away.

Ufos: The Reliable Cases Are Uninteresting And In The Interesting Cases Are Unreliable.

Personally, I Would Be Delighted If There Were A Life After Death, Especially If It Permitted Me To Continue To Learn About This World And Others, If It Gave Me A Chance To Discover How History Turns Out.

I Would Suggest That Science Is, At Least In My Part, Informed Worship.

But Down Deep, At The Molecular Heart Of Life We're Essentially Identical To Trees.

If All The Suns But Ours Collapsed Tonight, How Many Lifetimes Would It Take Us To Realize That We Were Alone?

What Is Called For Is An Exquisite Balance Between Two Conflicting Needs: The Most Skeptical Scrutiny Of All Hypotheses That Are Served Up To Us And At The Same Time A Great Openness To New Ideas. If You Are Only Skeptical, Then No New Ideas Make It Through To You. On The Other Hand, If You Are Open To The Point Of Gullibility And Have Not An Ounce Of Skeptical Sense In You, Then You Cannot Distinguish Useful Ideas From The Worthless Ones.

I Believe Our Future Depends Powerfully On How Well We Understand This Cosmos In Which We Float, Like A Mote Of Dust In The Morning Sky.

But Nature Is Always More Subtle, More Intricate, More Elegant Than What We Are Able To Imagine.

It Means Nothing To Be Open To A Proposition We Don't Understand.

An Atheist Has To Know A Lot More Than I Know. An Atheist Is Someone Who Knows There Is No God. By Some Definitions Atheism Is Very Stupid.

There Is No God

Cleverly Designed Experiments Are The Key.

Cutting Off Fundamental, Curiosity-driven Science Is Like Eating The Seed Corn. We May Have A Little More To Eat Next Winter But What Will We Plant So We And Our Children Will Have Enough To Get Through The Winters To Come?

Books Break The Shackles Of Time, Proof That Humans Can Work Magic.

Writing Is Perhaps The Greatest Of Human Inventions.

Science Is A Way To Call The Bluff Of Those Who Only Pretend To Knowledge. It Is A Bulwark Against Mysticism, Against Superstition, Against Religion Misapplied To Where It Has No Business Being.

On The Day That We Do Discover That We Are Not Alone, Our Society May Begin To Evolve And Transform In Some Incredible And Wondrous New Ways.

They (i. E., The Pythagoreans) Did Not Advocate The Free Confrontation Of Conflicting Points Of View. Instead, Like All Orthodox Religions, They Practised A Rigidity That Prevented Them From Correcting Their Errors.

In Exchange For Freedom Of Inquiry, Scientists Are Obliged To Explain Their Work.

We Are The Only Species On The Planet, So Far As We Know, To Have Invented A Communal Memory Stored Neither In Our Genes Nor In Our Brains. The Warehouse Of This Memory Is Called The Library

[n]o Scientist Likes To Be Criticized. ... But You Don't Reply To Critics: "wait A Minute, Wait A Minute; This Is A Really Good Idea. I'm Very Fond Of It. It's Done You No Harm. Please Don't Attack It." That's Not The Way It Goes. The Hard But Just Rule Is That If The Ideas Don't Work, You Must Throw Them Away. Don't Waste Any Neurons On What Doesn't Work. Devote Those Neurons To New Ideas That Better Explain The Data. Valid Criticism Is Doing You A Favor.

Any Civilization That Doesn't Develop Space Travel Dies.

At A Few Hundred Kilometers Altitude, The Earth Fills Half Your Sky, And The Band Of Blue That Stretches From Mindanao To Bombay, Which Your Eye Encompasses In A Single Glance, Can Break Your Heart With Its Beauty. Home You Think. Home. This Is My World. This Is Where I Come From. Everyone I Know, Everyone I Ever Heard Of, Grew Up Down There, Under That Relentless And Exquisite Blue.

We Are Star Stuff Which Has Taken Its Destiny Into Its Own Hands.

I Went To The Librarian And Asked For A Book About Stars.... And The Answer Was Stunning. It Was That The Sun Was A Star But Really Close. The Stars Were Suns, But So Far Away They Were Just Little Points Of Light.... The Scale Of The Universe Suddenly Opened Up To Me. It Was A Kind Of Religious Experience. There Was A Magnificence To It, A Grandeur, A Scale Which Has Never Left Me. Never Ever Left Me.

If Some Good Evidence For Life After Death Were Announced, I'd Be Eager To Examine It; But It Would Have To Be Real Scientific Data, Not Mere Anecdote. As With The Face On Mars And Alien Abductions, Better The Hard Truth, I Say, Than The Comforting Fantasy.

Maybe It's A Little Early. Maybe The Time Is Not Quite Yet. But Those Other Worlds - Promising Untold Opportunities - Beckon. Silently, They Orbit The Sun, Waiting.

We've Tended In Our Cosmologies To Make Things Familiar. Despite All Our Best Efforts, We've Not Been Very Inventive. In The West, Heaven Is Placid And Fluffy, And Hell Is Like The Inside Of A Volcano. In Many Stories, Both Realms Are Governed By Dominance Hierarchies Headed By Gods Or Devils. Monotheists Talked About The King Of Kings. In Every Culture We Imagined Something Like Our Own Political System Running The Universe. Few Found The Similarity Suspicious.

There Is In This Universe Much Of What Seems To Be Design.

The Neurochemistry Of The Brain Is Astonishingly Busy, The Circuitry Of A Machine More Wonderful Than Any Devised By Humans. But There Is No Evidence That Its Functioning Is Due To Anything More Than The 10(14) Neural Connections That Build An Elegant Architecture Of Consciousness.

If You Are Only Skeptical, Then No New Ideas Make It Through To You.

We Are Made Of Star-stuff. Our Bodies Are Made Of Star-stuff. There Are Pieces Of Star Within Us All.

For Myself, I Like A Universe That, Includes Much That Is Unknown And, At The Same Time, Much That Is Knowable. A Universe In Which Everything Is Known Would Be Static And Dull, As Boring As The Heaven Of Some Weak-minded Theologians. A Universe That Is Unknowable Is No Fit Place For A Thinking Being. The Ideal Universe For Us Is One Very Much Like The Universe We Inhabit. And I Would Guess That This Is Not Really Much Of A Coincidence.

Religions Contradict One Another-on Small Matters, Such As Whether We Should Put On A Hat Or Take One Off On Entering A House Of Worship, Or Whether We Should Eat Beef And Eschew Pork Or The Other Way Around, All The Way To The Most Central Issues, Such As Whether There Are No Gods, One God, Or Many Gods.

Much Of Human History Can, I Think, Be Described As A Gradual And Sometimes Painful Liberation From Provincialism, The Emerging Awareness That There Is More To The World Than Was Generally Believed By Our Ancestors.

Where Did God Come From? If We Decide This Is An Unanswerable Question Why Not Save A Step And Conclude That The Origin Of The Universe Is An Unanswerable Question.

Any Sufficiently Crisp Question Can Be Answered By A Single Binary Digit-0 Or 1, Yes Or No.

We Wish To Find The Truth, No Matter Where It Lies. But To Find The Truth We Need Imagination And Skepticism Both. We Will Not Be Afraid To Speculate, But We Will Be Careful To Distinguish Speculation From Fact.

Exploration Is In Our Nature. We Began As Wanderers, And We Are Wanderers Still. We Have Lingered Long Enough On The Shores Of The Cosmic Ocean. We Are Ready At Last To Set Sail For The Stars.

Discussing The Possibilities Of Extraterrestrial Life: I Would Love It Even If They Were Short, Sullen, Grumpy And Sexually Obsessed. But There Just Isn't Any Good Evidence.

All Of The Books In The World Contain No More Information Than Is Broadcast As Video In A Single Large American City In A Single Year. Not All Bits Have Equal Value.

If Intelligence Is Our Only Edge, We Must Learn To Use It Better, To Shape It, To Understand Its Limitations And Deficiencies -- To Use It As Cats Use Stealth, As Katydids Use Camouflage -- To Make It The Tool Of Our Survival.

Scientists Can Routinely Predict A Solar Eclipse, To The Minute, A Millennium In Advance. You Can Go To The Witch Doctor To Lift The Spell That Causes Your Pernicious Anaemia, Or You Can Take Vitamin B12. If You Want To Save Your Child From Polio, You Can Pray Or You Can Inoculate. If You're Interested In The Sex Of Your Unborn Child, You Can Consult Plumb-bob Danglers All You Want . . . But They'll Be Right, On Average, Only One Time In Two. If You Want Real Accuracy . . . Try Amniocentesis And Sonograms. Try Science.

For Me, The Most Ironic Token Of [the First Human Moon Landing] Is The Plaque Signed By President Richard M. Nixon That Apollo 11 Took To The Moon. It Reads, ‘we Came In Peace For All Mankind.’ As The United States Was Dropping Seven And A Half Megatons Of Conventional Explosives On Small Nations In Southeast Asia, We Congratulated Ourselves On Our Humanity. We Would Harm No One On A Lifeless Rock.

The Very Act Of Understanding Is A Celebration Of Joining, Merging, Even If On A Very Modest Scale, With The Magnificence Of The Cosmos.

The Hindu Religion Is The Only One Of The World’s Great Faiths Dedicated To The Idea That The Cosmos Itself Undergoes An Immense, Indeed An Infinite, Number Of Deaths And Rebirths. It Is The Only Religion In Which The Time Scales Correspond, No Doubt By Accident, To Those Of Modern Scientific Cosmology. Its Cycles Run From Our Ordinary Day And Night To A Day And Night Of Brahma, 8.64 Billion Years Long, Longer Than The Age Of The Earth Or The Sun And About Half The Time Since The Big Bang.

Those Who Seek Power At Any Price Detect A Societal Weakness, A Fear That They Can Ride Into Office.

And You Are Made Of A Hundred Trillion Cells. We Are, Each Of Us, A Multitude.

She Had Studied The Universe All Her Life, But Had Overlooked Its Clearest Message: For Small Creatures Such As We The Vastness Is Bearable Only Through Love.

Small Creatures

Science Is A Collaborative Enterprise, Spanning The Generations. When It Permits Us To See The Far Side Of Some New Horizon, We Remember Those Who Prepared The Way - Seeing For Them Also.

If We Say That God Has Always Been, Why Not Save A Step And Conclude That The Universe Has Always Been?

I Think If We Ever Reach The Point Where We Think We Thoroughly Understand Who We Are And Where We Came From, We Will Have Failed.

By Exploring Other Worlds We Safeguard This One. By Itself, I Think This Fact More Than Justifies The Money Our Species Has Spent In Sending Ships To Other Worlds. It Is Our Fate To Live During One Of The Most Perilous And, At The Same Time, One Of The Most Hopeful Chapters In Human History.

Advances In Medicine And Agriculture Have Saved Vastly More Lives Than Have Been Lost In All The Wars In History.

Every Time You Look Up At The Sky, Every One Of Those Points Of Light Is A Reminder That Fusion Power Is Extractable From Hydrogen And Other Light Elements, And It Is An Everyday Reality Throughout The Milky Way Galaxy.

The Difference Between Physics And Metaphysics Is Not That The Practitioners Of One Are Smarter Than The Practitioners Of The Other. The Difference Is That The Metaphysicist Has No Laboratory.

Which Aspects Of Our Nature Will Prevail Is Uncertain, Particularly When Our Visions And Prospects Are Bound To One Small Part Of The Small Planet Earth. But Up There In The Cosmos An Inescapable Perspective Awaits.

A Tiny Blue Dot Set In A Sunbeam. Here It Is. That's Where We Live. That's Home. We Humans Are One Species And This Is Our World. It Is Our Responsibility To Cherish It. Of All The Worlds In Our Solar System, The Only One So Far As We Know, Graced By Life.

We Live In An In-between Universe Where Things Change All Right...but According To Patterns, Rules, Or As We Call Them, Laws Of Nature.

Few Scientists Now Dispute That Today's Soaring Levels Of Carbon Dioxide And Other Gases In The Atmosphere Will Cause Global Temperature Averages To Rise By As Much As Nine Degrees Fahrenheit Sometime After The Year 2000.

The Absence Of Evidence Is Not The Evidence Of Absence.

Man Is The Matter Of The Cosmos, Contemplating Itself.

If We Are Merely Matter Intricately Assembled, Is This Really Demeaning? If There's Nothing Here But Atoms, Does That Make Us Less Or Does That Make Matter More?

I Think The Discomfort That Some People Feel In Going To The Monkey Cages At The Zoo Is A Warning Sign.

Our Species Needs, And Deserves, A Citizenry With Minds Wide Awake And A Basic Understanding Of How The World Works.

If You Wish To Make An Apple Pie From Scratch, You Must First Invent The Universe.

I Don't Know The Answer. Maybe No One Knows. Maybe When You Grow Up, You'll Be The First To Find Out.

Our Ancestors Worshipped The Sun, And They Were Not That Foolish. It Makes Sense To Revere The Sun And The Stars, For We Are Their Children.

Once We Overcome Our Fear Of Being Tiny, We Find Ourselves On The Threshold Of A Vast And Awesome Universe That Utterly Dwarfs — In Time, In Space, And In Potential — The Tidy Anthropocentric Proscenium Of Our Ancestors.

The Brain Is Like A Muscle. When It Is In Use We Feel Very Good. Understanding Is Joyous.

The Open Road Still Softly Calls.

Preserve And Cherish The Pale Blue Dot, The Only Home We've Ever Known.

We Are The First Species To Have Taken Our Evolution Into Our Own Hands.

Accommodation To Change, The Thoughtful Pursuit Of Alternative Futures Are Keys To The Survival Of Civilization And Perhaps Of The Human Species.

There Is A Reward Structure In Science That Is Very Interesting: Our Highest Honors Go To Those Who Disprove The Findings Of The Most Revered Among Us. So Einstein Is Revered Not Just Because He Made So Many Fundamental Contributions To Science, But Because He Found An Imperfection In The Fundamental Contribution Of Isaac Newton.

Is It Fair To Be Suspicious Of An Entire Profession Because Of A Few Bad Apples? There Are At Least Two Important Differences, It Seems To Me. First, No One Doubts That Science Actually Works, Whatever Mistaken And Fraudulent Claim May From Time To Time Be Offered. But Whether There Are Any Miraculous Cures From Faith-healing, Beyond The Body's Own Ability To Cure Itself, Is Very Much At Issue. Secondly, The Expose' Of Fraud And Error In Science Is Made Almost Exclusively By Science. But The Exposure Of Fraud And Error In Faith-healing Is Almost Never Done By Other Faith-healers.

Our Loyalties Are To The Species And The Planet. We Speak For Earth. Our Obligation To Survive Is Owed Not Just To Ourselves But Also To That Cosmos, Ancient And Vast, From Which We Spring.

I Believe That Even A Smattering Of Such Findings In Modern Science And Mathematics Is Far More Compelling And Exciting Than Most Of The Doctrines Of Pseudoscience, Whose Practitioners Were Condemned As Early As The Fifth Century B.c. By The Ionian Philosopher Heraclitus As “nigh -walkers, Magicians, Priests Of Bacchus, Priestesses Of The Wine-vat, Mystery-mongers.” But Science Is More Intricate And Subtle, Reveals A Much Richer Imiverse, And Powerfully Evokes Our Sense Of Wonder.

I’m Struck Again By The Irony That Spaceflight-conceived In The Cauldron Of Nationalist Rivalries And Hatreds-brings With It A Stunning Transnational Vision. You Spend Even A Little Time Contemplating The Earth From Orbit And The Most Deeply Engrained Nationalisms Begin To Erode. They Seem The Squabbles Of Mites On A Plum.

It Took The Church Until 1832 To Remove Galileo 's Work From Its List Of Books Which Catholics Were Forbidden To Read At The Risk Of Dire Punishment Of Their Immortal Souls.

Before We Invented Civilization Our Ancestors Lived Mainly In The Open Out Under The Sky. Before We Devised Artificial Lights And Atmospheric Pollution And Modern Forms Of Nocturnal Entertainment We Watched The Stars. There Were Practical Calendar Reasons Of Course But There Was More To It Than That. Even Today The Most Jaded City Dweller Can Be Unexpectedly Moved Upon Encountering A Clear Night Sky Studded With Thousands Of Twinkling Stars. When It Happens To Me After All These Years It Still Takes My Breath Away.

Extraordinary Observations Require Extraordinary Evidence To Make Them Believable.

The Hole In The Ozone Layer Is A Kind Of Skywriting. At First It Seemed To Spell Out Our Continuing Complacency Before A Witch's Brew Of Deadly Perils. But Perhaps It Really Tells Of A Newfound Talent To Work Together To Protect The Global Environment.

An Extraterrestrial Being, Newly Arrived On Earth - Scrutinizing What We Mainly Present To Our Children In Television, Radio, Movies, Newspapers, Magazines, The Comics, And Many Books - Might Easily Conclude That We Are Intent On Teaching Them Murder, Rape, Cruelty, Superstition, Credulity, And Consumerism. We Keep At It, And Through Constant Repetition Many Of Them Finally Get It.

I Also Wish That The Pledge Of Allegiance Were Directed At The Constitution And The Bill Of Rights, As It Is When The President Takes His Oath Of Office, Rather Than To The Flag And The Nation

'in His Celebrated Book, 'on Liberty', The English Philosopher John Stuart Mill Argued That Silencing An Opinion Is "a Peculiar Evil." If The Opinion Is Right, We Are Robbed Of The "opportunity Of Exchanging Error For Truth"; And If It's Wrong, We Are Deprived Of A Deeper Understanding Of The Truth In Its "collision With Error." If We Know Only Our Own Side Of The Argument, We Hardly Know Even That: It Becomes Stale, Soon Learned By Rote, Untested, A Pallid And Lifeless Truth.'

You're An Interesting Species, An Interesting Mix. You're Capable Of Such Beautiful Dreams And Such Horrible Nightmares. You Feel So Lost, So Cut Off, So Alone, Only You're Not. See, In All Our Searching, The Only Thing We've Found That Makes The Emptiness Bearable Is Each Other.

Somewhere, Something Incredible Is Waiting To Be Known.

But I Try Not To Think With My Gut. If I'm Serious About Understanding The World, Thinking With Anything Besides My Brain, As Tempting As That Might Be, Is Likely To Get Me Into Trouble.

Except For Children (who Don't Know Enough Not To Ask The Important Questions), Few Of Us Spendtime Wondering Why Nature Is The Way It Is . . .

The Fact That So Little Of The Findings Of Modern Science Is Prefigured In Scripture To My Mind Casts Further Doubt On It Divine Inspiration.

It Is Said That Men May Not Be The Dreams Of The God, But Rather That The Gods Are The Dreams Of Men.

I'm Only A Four-dimensional Creature. Haven't Got A Clue How To Visualise Infinity. Even Einstein Hadn't. I Know Because I Asked Him

We Are All Made Up Of Star Stuff.

Scientists Constantly Get Clobbered With The Idea That We Spent 27 Billion Dollars On The Apollo Programs, And Are Asked "what More Do You Want?" We Didn't Spend It; It Was Done For Political Reasons. ... Apollo Was A Response To The Bay Of Pigs Fiasco And To The Successful Orbital Flight Of Yuri Gagarin. President Kennedy's Objective Was Not To Find Out The Origin Of The Moon By The End Of The Decade; Rather It Was To Put A Man On The Moon And Bring Him Back, And We Did That.

If There Is Life, Then I Believe We Should Do Nothing To Disturb That Life. Mars Then, Belongs To The Martians, Even If They Are Microbes.

The Immense Distances To The Stars And The Galaxies Mean That We See Everything Ins Pace Int He Past, Some As They Were Before The Earth Came To Be. Telescopes Are Time Machines.

Better The Hard Truth, I Say, Than The Comforting Fantasy.

I Am Not An Atheist. An Atheist Is Someone Who Has Compelling Evidence That There Is No Judeo-christian-islamic God. I Am Not That Wise, But Neither Do I Consider There To Be Anything Approaching Adequate Evidence For Such A God. Why Are You In Such A Hurry To Make Up Your Mind? Why Not Simply Wait Until There Is Compelling Evidence?

Our Concern For The Future Can Be Tested By How Well We Support Our Libraries.

It Is All A Matter Of Time Scale. An Event That Would Be Unthinkable In A Hundred Years May Be Inevitable In A Hundred Million.

There Is Every Reason To Think That In The Coming Years Mars And Its Mysteries Will Become Increasingly Familiar To The Inhabitants Of The Planet Earth.

(when Asked Merely If They Accept Evolution, 45 Percent Of Americans Say Yes. The Figure Is 70 Percent In China.) When The Movie Jurassic Park Was Shown In Israel, It Was Condemned By Some Orthodox Rabbis Because It Accepted Evolution And Because It Taught That Dinosaurs Lived A Hundred Million Years Ago-when, As Is Plainly Stated At Every Rosh Hashonhan And Every Jewish Wedding Ceremony, The Universe Is Less Than 6,000 Years Old.

A Millennium Before Europeans Were Willing To Divest Themselves Of The Biblical Idea That The World Was A Few Thousand Years Old, The Mayans Were Thinking Of Millions And The Hindus Billions.

Science Is Much More Than A Body Of Knowledge. It Is A Way Of Thinking. This Is Central To Its Success. Science Invites Us To Let The Facts In, Even When They Don't Conform To Our Preconceptions. It Counsels Us To Carry Alternative Hypotheses In Our Heads And See Which Ones Best Match The Facts. It Urges On Us A Fine Balance Between No-holds-barred Openness To New Ideas, However Heretical, And The Most Rigorous Skeptical Scrutiny Of Everything - New Ideas And Established Wisdom.

Imagine We Could Accelerate Continuously At 1 G-what We're Comfortable With On Good Old Terra Firma-to The Midpoint Of Our Voyage, And Decelerate Continuously At 1 G Until We Arrive At Our Destination. It Would Take A Day To Get To Mars, A Week And A Half To Pluto, A Year To The Oort Cloud, And A Few Years To The Nearest Stars.

There Are Lots Of Ways To Communicate What We Know, But Few Ways To Communicate What We Feel. Music Is One Way To Communicate Emotions.

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