---
title: "103 David Grinspoon Quotes - Famous Astronomer"
description: "David Grinspoon quotes about science, alien life, and Earth's climate history."
image: "https://sms4smile.com/quotes/wp-content/uploads/sms4s/authors/processed/b002/author-david-grinspoon-5141.jpg"
---

![Portrait of David Grinspoon](https://sms4smile.com/quotes/wp-content/uploads/sms4s/authors/processed/b002/author-david-grinspoon-5141.jpg)

# David Grinspoon

(1959)   Astronomer

 **103** quotes in **335** categories

David Grinspoon points out that good science‑fiction writers keep a close eye on real scientific discoveries. He also asks us to imagine alien intelligences that could create art, which forces us to think about what art and consciousness really are. Finally, he reminds us that our climate and our place in Earth's long geological story are fragile and deserve careful study.

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David Grinspoon is an astronomer.

## Quick Facts About David Grinspoon

Born January 1, 1959

Profession Astronomer

## About David Grinspoon

David H. Grinspoon served as NASA’s Senior Scientist for Astrobiology Strategy from 2023 to 2025. He was also the first Baruch S. Blumberg NASA/Library of Congress Chair in Astrobiology during 2012–2013.

##  Quotes by David Grinspoon

> [The hallmark of the human species is great adaptability.](https://sms4smile.com/quotes/david-grinspoon/the-hallmark-of-the-human-species-is-great-adaptability/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Adaptability](https://sms4smile.com/quotes/about/adaptability/)

[Image](https://sms4smile.com/quotes/i/7a3/david-grinspoon-5141_adaptability_the-hallmark-of-the-human-species-is-gre_942714.jpg)

> [We can look out on an alien landscape that no one has seen before and find it beautiful.](https://sms4smile.com/quotes/david-grinspoon/we-can-look-out-on-an-alien-landscape-that-no-one-has-seen-before-and/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Alien](https://sms4smile.com/quotes/about/alien/)

[Image](https://sms4smile.com/quotes/i/8fb/david-grinspoon-5141_alien_we-can-look-out-on-an-alien-landscape-th_2101732.jpg)

> [We don't know that Venus had oceans, but there's every reason to believe it did.](https://sms4smile.com/quotes/david-grinspoon/we-don-t-know-that-venus-had-oceans-but-there-s-every-reason-to/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Believe](https://sms4smile.com/quotes/about/believe/)

[Image](https://sms4smile.com/quotes/i/e44/david-grinspoon-5141_believe_we-don-t-know-that-venus-had-oceans-but_2593226.jpg)

> [It's quite possible there's as much lightning on Venus as on Earth.](https://sms4smile.com/quotes/david-grinspoon/it-s-quite-possible-there-s-as-much-lightning-on-venus-as-on-earth/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Earth](https://sms4smile.com/quotes/about/earth/)

[Image](https://sms4smile.com/quotes/i/22a/david-grinspoon-5141_earth_it-s-quite-possible-there-s-as-much-ligh_940241.jpg)

> [I'm a strong advocate of new missions to Venus.](https://sms4smile.com/quotes/david-grinspoon/i-m-a-strong-advocate-of-new-missions-to-venus/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Advocate](https://sms4smile.com/quotes/about/advocate/)

[Image](https://sms4smile.com/quotes/i/a48/david-grinspoon-5141_advocate_i-m-a-strong-advocate-of-new-missions-to_1853868.jpg)

> [I will defend the NASA Earth Science Division with everything I've got.](https://sms4smile.com/quotes/david-grinspoon/i-will-defend-the-nasa-earth-science-division-with-everything-i-ve-got/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Defend](https://sms4smile.com/quotes/about/defend/)

[Image](https://sms4smile.com/quotes/i/14d/david-grinspoon-5141_earth_i-will-defend-the-nasa-earth-science-div_907097.jpg)

> [Fixing global warming is more important than astronomy.](https://sms4smile.com/quotes/david-grinspoon/fixing-global-warming-is-more-important-than-astronomy/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Astronomy](https://sms4smile.com/quotes/about/astronomy/)

[Image](https://sms4smile.com/quotes/i/9f3/david-grinspoon-5141_astronomy_fixing-global-warming-is-more-important_1780264.jpg)

> [Mars does not belong to 'America,' nor to Earth, nor to human beings.](https://sms4smile.com/quotes/david-grinspoon/mars-does-not-belong-to-america-nor-to-earth-nor-to-human-beings/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[America](https://sms4smile.com/quotes/about/america/)

[Image](https://sms4smile.com/quotes/i/343/david-grinspoon-5141_america_mars-does-not-belong-to-america-nor-to-e_2738093.jpg)

> [There are other planets besides the Earth and Mars. I'd like to remind you that studying Venus is vital to understanding life…](https://sms4smile.com/quotes/david-grinspoon/there-are-other-planets-besides-the-earth-and-mars-i-d-like-to-remind/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Earth](https://sms4smile.com/quotes/about/earth/)

[Image](https://sms4smile.com/quotes/i/dbf/david-grinspoon-5141_earth_there-are-other-planets-besides-the-eart_1913263.jpg)

> [Even cynical, selfish people will realize, one way or the other, that it's not in their self-interest to act in self-destructive ways.](https://sms4smile.com/quotes/david-grinspoon/even-cynical-selfish-people-will-realize-one-way-or-the-other-that-it/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Cynical](https://sms4smile.com/quotes/about/cynical/)

[Image](https://sms4smile.com/quotes/i/49c/david-grinspoon-5141_cynical_even-cynical-selfish-people-will-realize_2140558.jpg)

> [What I'm interested in is the conversations going on about the Anthropocene and what it means to view ourselves as a part…](https://sms4smile.com/quotes/david-grinspoon/what-i-m-interested-in-is-the-conversations-going-on-about-the/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Communication](https://sms4smile.com/quotes/about/communication/)

[Image](https://sms4smile.com/quotes/i/fa4/david-grinspoon-5141_communication_what-i-m-interested-in-is-the-conversati_60509.jpg)

> [The mature Anthropocene begins when we acquire the ability to live sustainably and become a lasting presence on this world.](https://sms4smile.com/quotes/david-grinspoon/the-mature-anthropocene-begins-when-we-acquire-the-ability-to-live/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Ability](https://sms4smile.com/quotes/about/ability/)

[Image](https://sms4smile.com/quotes/i/242/david-grinspoon-5141_ability_the-mature-anthropocene-begins-when-we-a_1185760.jpg)

> [I'd been politically active ever since my parents wheeled me in a stroller in a 'ban the bomb' march in Boston in 1963.](https://sms4smile.com/quotes/david-grinspoon/i-d-been-politically-active-ever-since-my-parents-wheeled-me-in-a/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Bomb](https://sms4smile.com/quotes/about/bomb/)

[Image](https://sms4smile.com/quotes/i/10a/david-grinspoon-5141_bomb_i-d-been-politically-active-ever-since-m_77222.jpg)

> [I think that an advanced planetary civilization will modify their own planets to be more stable, to prevent asteroid impacts and dangerous…](https://sms4smile.com/quotes/david-grinspoon/i-think-that-an-advanced-planetary-civilization-will-modify-their-own/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Civilization](https://sms4smile.com/quotes/about/civilization/)

[Image](https://sms4smile.com/quotes/i/c14/david-grinspoon-5141_civilization_i-think-that-an-advanced-planetary-civil_212955.jpg)

> [There's no question to my mind that saving our civilization and many other species is more important than our ability to do…](https://sms4smile.com/quotes/david-grinspoon/there-s-no-question-to-my-mind-that-saving-our-civilization-and-many/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Ability](https://sms4smile.com/quotes/about/ability/)

[Image](https://sms4smile.com/quotes/i/99f/david-grinspoon-5141_ability_there-s-no-question-to-my-mind-that-savi_1731972.jpg)

> [What we should really be thinking about is what it would look like for a truly intelligent technological species to be interacting…](https://sms4smile.com/quotes/david-grinspoon/what-we-should-really-be-thinking-about-is-what-it-would-look-like/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Like](https://sms4smile.com/quotes/about/like/)

[Image](https://sms4smile.com/quotes/i/64e/david-grinspoon-5141_like_what-we-should-really-be-thinking-about_3010273.jpg)

> [The planet Mars - crimson and bright, filling our telescopes with vague intimations of almost-familiar landforms - has long formed a celestial…](https://sms4smile.com/quotes/david-grinspoon/the-planet-mars-crimson-and-bright-filling-our-telescopes-with-vague/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Alien](https://sms4smile.com/quotes/about/alien/)

[Image](https://sms4smile.com/quotes/i/126/david-grinspoon-5141_alien_the-planet-mars-crimson-and-bright-filli_127774.jpg)

> [Astrobiology is the science of life in the universe. It's an attempt to scientifically deal with the question of whether or not…](https://sms4smile.com/quotes/david-grinspoon/astrobiology-is-the-science-of-life-in-the-universe-it-s-an-attempt/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Alone](https://sms4smile.com/quotes/about/alone/)

[Image](https://sms4smile.com/quotes/i/fd2/david-grinspoon-5141_alone_astrobiology-is-the-science-of-life-in-t_2741767.jpg)

> [Astrobiology is a great point of contact for science outreach. The public is naturally interested in extra-terrestrial life. Astrobiology provides an accessible…](https://sms4smile.com/quotes/david-grinspoon/astrobiology-is-a-great-point-of-contact-for-science-outreach-the/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Access](https://sms4smile.com/quotes/about/access/)

[Image](https://sms4smile.com/quotes/i/b66/david-grinspoon-5141_access_astrobiology-is-a-great-point-of-contact_2664456.jpg)

> [We have all this very clever technology and all these abilities to manipulate the world in all these ways, yet we are…](https://sms4smile.com/quotes/david-grinspoon/we-have-all-this-very-clever-technology-and-all-these-abilities-to/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Clever](https://sms4smile.com/quotes/about/clever/)

[Image](https://sms4smile.com/quotes/i/732/david-grinspoon-5141_clever_we-have-all-this-very-clever-technology_110535.jpg)

> [There is a history of thinking about space science from an environmental ethics perspective. And part of what I want to do…](https://sms4smile.com/quotes/david-grinspoon/there-is-a-history-of-thinking-about-space-science-from-an/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Experience](https://sms4smile.com/quotes/about/experience/)

[Image](https://sms4smile.com/quotes/i/ccd/david-grinspoon-5141_experience_there-is-a-history-of-thinking-about-spa_984086.jpg)

> [NASA, and all the other spacefaring nations of the world, have agreed to a set of 'planetary-protection' principles, aimed at preventing the…](https://sms4smile.com/quotes/david-grinspoon/nasa-and-all-the-other-spacefaring-nations-of-the-world-have-agreed/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Earth](https://sms4smile.com/quotes/about/earth/)

[Image](https://sms4smile.com/quotes/i/39e/david-grinspoon-5141_earth_nasa-and-all-the-other-spacefaring-natio_1428178.jpg)

> [You cannot study other planets without referring to Earth and without applying the techniques and the insights of Earth science. And you…](https://sms4smile.com/quotes/david-grinspoon/you-cannot-study-other-planets-without-referring-to-earth-and-without/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Earth](https://sms4smile.com/quotes/about/earth/)

[Image](https://sms4smile.com/quotes/i/89d/david-grinspoon-5141_earth_you-cannot-study-other-planets-without-r_2861027.jpg)

> [Humanity has at least a dim, and growing, cognisance of the effects of its presence on this planet. The possibility that we…](https://sms4smile.com/quotes/david-grinspoon/humanity-has-at-least-a-dim-and-growing-cognisance-of-the-effects-of/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Awareness](https://sms4smile.com/quotes/about/awareness/)

[Image](https://sms4smile.com/quotes/i/b12/david-grinspoon-5141_awareness_humanity-has-at-least-a-dim-and-growing_1277396.jpg)

> [Before we go there and set up greenhouses, dance clubs, and falafel stands, let's make sure that, in some subtle form that…](https://sms4smile.com/quotes/david-grinspoon/before-we-go-there-and-set-up-greenhouses-dance-clubs-and-falafel/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Cities](https://sms4smile.com/quotes/about/cities/)

[Image](https://sms4smile.com/quotes/i/590/david-grinspoon-5141_cities_before-we-go-there-and-set-up-greenhouse_1660739.jpg)

> [There's something cool about being involved in new missions to other planets.](https://sms4smile.com/quotes/david-grinspoon/there-s-something-cool-about-being-involved-in-new-missions-to-other/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Being](https://sms4smile.com/quotes/about/being/)

[Image](https://sms4smile.com/quotes/i/3ec/david-grinspoon-5141_being_there-s-something-cool-about-being-invol_2807746.jpg)

> [Earth's biosphere gave birth to humans and our thoughts, which are now reshaping its planetary cycles. A planet with brains? Fancy that.](https://sms4smile.com/quotes/david-grinspoon/earth-s-biosphere-gave-birth-to-humans-and-our-thoughts-which-are-now/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Biosphere](https://sms4smile.com/quotes/about/biosphere/)

[Image](https://sms4smile.com/quotes/i/503/david-grinspoon-5141_birth_earth-s-biosphere-gave-birth-to-humans-a_1028527.jpg)

> [Radiation is one of the important factors in evolution. It causes mutation, and some level of mutation is actually good for evolution.](https://sms4smile.com/quotes/david-grinspoon/radiation-is-one-of-the-important-factors-in-evolution-it-causes/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Biology](https://sms4smile.com/quotes/about/biology/)

[Image](https://sms4smile.com/quotes/i/84a/david-grinspoon-5141_biology_radiation-is-one-of-the-important-factor_3137329.jpg)

> [We need to have a vision of the world we want to create so that we can see ourselves as collaborators with…](https://sms4smile.com/quotes/david-grinspoon/we-need-to-have-a-vision-of-the-world-we-want-to-create-so-that-we/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Create](https://sms4smile.com/quotes/about/create/)

[Image](https://sms4smile.com/quotes/i/7d3/david-grinspoon-5141_create_we-need-to-have-a-vision-of-the-world-we_2296260.jpg)

> [We're going to stop looking at Earth from orbit because we don't like what we are seeing and the conclusions that leads…](https://sms4smile.com/quotes/david-grinspoon/we-re-going-to-stop-looking-at-earth-from-orbit-because-we-don-t-like/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Earth](https://sms4smile.com/quotes/about/earth/)

[Image](https://sms4smile.com/quotes/i/e26/david-grinspoon-5141_earth_we-re-going-to-stop-looking-at-earth-fro_2727002.jpg)

> [As a young planet, Venus was losing hydrogen rapidly to space. The oceans boiled off, and after some period of time, perhaps…](https://sms4smile.com/quotes/david-grinspoon/as-a-young-planet-venus-was-losing-hydrogen-rapidly-to-space-the/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Losing](https://sms4smile.com/quotes/about/losing/)

[Image](https://sms4smile.com/quotes/i/322/david-grinspoon-5141_losing_as-a-young-planet-venus-was-losing-hydro_2017090.jpg)

> [The story of our species is one of overcoming existential risk through new forms of cooperation and innovation.](https://sms4smile.com/quotes/david-grinspoon/the-story-of-our-species-is-one-of-overcoming-existential-risk/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Cooperation](https://sms4smile.com/quotes/about/cooperation/)

[Image](https://sms4smile.com/quotes/i/45c/david-grinspoon-5141_cooperation_the-story-of-our-species-is-one-of-overc_2474952.jpg)

> [Earth is going to lose its oceans in the future, just as Venus did in the past. How long planets retain their…](https://sms4smile.com/quotes/david-grinspoon/earth-is-going-to-lose-its-oceans-in-the-future-just-as-venus-did-in/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Future](https://sms4smile.com/quotes/about/future/)

[Image](https://sms4smile.com/quotes/i/901/david-grinspoon-5141_future_earth-is-going-to-lose-its-oceans-in-the_1706318.jpg)

> [As a kid, I became a total SF geek. It started in the 5th grade with Asimov's 'Lucky Starr' series of what…](https://sms4smile.com/quotes/david-grinspoon/as-a-kid-i-became-a-total-sf-geek-it-started-in-the-5th-grade-with/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Asimov](https://sms4smile.com/quotes/about/asimov/)

[Image](https://sms4smile.com/quotes/i/326/david-grinspoon-5141_lucky_as-a-kid-i-became-a-total-sf-geek-it-sta_2000101.jpg)

> [If we gutted NASA Earth Science, it wouldn't be NOAA or some other agency that would take the lead. It would be…](https://sms4smile.com/quotes/david-grinspoon/if-we-gutted-nasa-earth-science-it-wouldn-t-be-noaa-or-some-other/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Agency](https://sms4smile.com/quotes/about/agency/)

[Image](https://sms4smile.com/quotes/i/967/david-grinspoon-5141_agency_if-we-gutted-nasa-earth-science-it-would_42404.jpg)

> [Part of the point of SETI has always been a search for answers about our own cosmic potential and destiny. If 'they'…](https://sms4smile.com/quotes/david-grinspoon/part-of-the-point-of-seti-has-always-been-a-search-for-answers-about/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Destiny](https://sms4smile.com/quotes/about/destiny/)

[Image](https://sms4smile.com/quotes/i/e98/david-grinspoon-5141_destiny_part-of-the-point-of-seti-has-always-bee_1419783.jpg)

> [It's quite possible that the end of us will not be the end of the Earth. Even if we really screw things…](https://sms4smile.com/quotes/david-grinspoon/it-s-quite-possible-that-the-end-of-us-will-not-be-the-end-of-the/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Civilization](https://sms4smile.com/quotes/about/civilization/)

[Image](https://sms4smile.com/quotes/i/26f/david-grinspoon-5141_civilization_it-s-quite-possible-that-the-end-of-us-w_1304533.jpg)

> [Earth is a stunningly lovely planet for so many reasons. Among these is the wondrous presence of curious, artful, inventive humanity.](https://sms4smile.com/quotes/david-grinspoon/earth-is-a-stunningly-lovely-planet-for-so-many-reasons-among-these/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Curious](https://sms4smile.com/quotes/about/curious/)

[Image](https://sms4smile.com/quotes/i/d5c/david-grinspoon-5141_curious_earth-is-a-stunningly-lovely-planet-for_2006035.jpg)

> [Even as a kid enthralled with science fiction, I wondered about the role of people in the long-term evolution of the Earth,…](https://sms4smile.com/quotes/david-grinspoon/even-as-a-kid-enthralled-with-science-fiction-i-wondered-about-the/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[Biology](https://sms4smile.com/quotes/about/biology/)

[Image](https://sms4smile.com/quotes/i/c9d/david-grinspoon-5141_biology_even-as-a-kid-enthralled-with-science-fi_3093341.jpg)

> [I think Pluto has to be considered among the places in the solar system that are possible homes for life.](https://sms4smile.com/quotes/david-grinspoon/i-think-pluto-has-to-be-considered-among-the-places-in-the-solar/)

[David Grinspoon](https://sms4smile.com/quotes/author/david-grinspoon/)

[I think](https://sms4smile.com/quotes/about/i-think/)

[Image](https://sms4smile.com/quotes/i/120/david-grinspoon-5141_i-think_i-think-pluto-has-to-be-considered-among_1043941.jpg)

## David Grinspoon by topic

[Earth (25)](https://sms4smile.com/quotes/about/earth/david-grinspoon/) [Space (21)](https://sms4smile.com/quotes/about/space/david-grinspoon/) [Life (17)](https://sms4smile.com/quotes/about/life/david-grinspoon/) [Time (16)](https://sms4smile.com/quotes/about/time/david-grinspoon/) [Science (16)](https://sms4smile.com/quotes/about/science/david-grinspoon/) [Nature of man (10)](https://sms4smile.com/quotes/about/nature-of-man/david-grinspoon/) [Nature (10)](https://sms4smile.com/quotes/about/nature/david-grinspoon/) [Future (10)](https://sms4smile.com/quotes/about/future/david-grinspoon/)

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                        "text": "Before we go there and set up greenhouses, dance clubs, and falafel stands, let's make sure that, in some subtle form that could be harmed by the human hubbub, life does not already exist there. If not, then by all means build cities, plant forests and fill lakes and streams with trout -- bring life to Mars and Mars to life. We'll then be the Martians we've been dreaming about for all these years.",
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                        "text": "Earth's biosphere gave birth to humans and our thoughts, which are now reshaping its planetary cycles. A planet with brains? Fancy that.",
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                        "text": "Earth is going to lose its oceans in the future, just as Venus did in the past. How long planets retain their oceans is a function of distance from the sun, all other things being equal.",
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