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" There's something cool about being involved in new missions to other planets. "

David Grinspoon

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" Seriously, we should start taxing churches and have tax-exempt places for worship and study of nature and art. Charge ten bucks for Sunday services and make the Botanic Gardens free. "

David Grinspoon

" Once we become a multiplanet species, our chances to live long and prosper will take a huge leap skyward. "

David Grinspoon

" You cannot study other planets without referring to Earth and without applying the techniques and the insights of Earth science. And you cannot really do a good job understanding the Earth without the insights from planetary exploration. "

David Grinspoon

" I think a lot of people interested in space exploration tend to hear stories about the great missions, how they work technically, what we learned. But they don't really hear the story of what it takes to get a mission from scratch to the launch pad and into space. "

David Grinspoon

" What if life is not carbon-based? Can life exist as a gas or a plasma? Could planets or stars in some sense be alive? What about an interstellar cloud? Could life exist on such a small or large scale, or move so fast or so slowly that we wouldn't recognize it? Could you have an intelligent virus? "

David Grinspoon

" The story of our species is one of overcoming existential risk through new forms of cooperation and innovation. "

David Grinspoon

" What I'm interested in is the conversations going on about the Anthropocene and what it means to view ourselves as a part of Earth's geological history. "

David Grinspoon

" Why should we consider defining intelligence as something global and as something that hasn't actually yet appeared on Earth? It may be useful for envisioning the future of our own civilization and any others that may be out there among the stars. It might give us something to strive for. "

David Grinspoon

" Part of the point of SETI has always been a search for answers about our own cosmic potential and destiny. If 'they' are out there, it means that there may be hope for us. "

David Grinspoon

" Whenever I see a nighttime picture of Earth from space, with its glowing lights, I am stirred by its beauty. "

David Grinspoon

" There is a history of thinking about space science from an environmental ethics perspective. And part of what I want to do is turn that back and use that experience to see if it reflects how we think about the Earth. "

David Grinspoon

" The mature Anthropocene begins when we acquire the ability to live sustainably and become a lasting presence on this world. "

David Grinspoon

" If we gutted NASA Earth Science, it wouldn't be NOAA or some other agency that would take the lead. It would be the Chinese and the Europeans and the Japanese. "

David Grinspoon

" Mars does not belong to 'America,' nor to Earth, nor to human beings. "

David Grinspoon

" It's one of the big mysteries about Venus: How did it get so different from Earth when it seems likely to have started so similarly? The question becomes richer when you consider astrobiology, the possibility that Venus and Earth were very similar during the time of the origin of life on Earth. "

David Grinspoon

" The planet Mars - crimson and bright, filling our telescopes with vague intimations of almost-familiar landforms - has long formed a celestial tabula rasa on which we have inscribed our planetological theories, utopian fantasies, and fears of alien invasion or ecological ruin. "

David Grinspoon

" It's OK to pursue speculative ideas because we don't want to be too cozy and safe and assume that we know everything about life in the universe. However, we have to be rigorous and careful and honest and logical and scientifically meticulous when we speculate. "

David Grinspoon

" I think the best SF writers are very aware of what we, in the scientific community, are doing, thinking, and discovering. "

David Grinspoon

" In my Ph.D. thesis, written in 1989, I discussed the fact that when a civilization develops the technology to prevent catastrophic asteroid impacts, it marks a significant moment in the evolution of the planet. "

David Grinspoon

" It turns out one of my dad's best friends was Carl Sagan when I was little. They were both Harvard professors. "

David Grinspoon

" As a kid, I became a total SF geek. It started in the 5th grade with Asimov's 'Lucky Starr' series of what would now be called 'young adult' novels of adventures in the solar system. "

David Grinspoon

" We need visions of a future in which we have applied our infinite creativity to the task of living on a finite world, where we have embraced our role, become comfortable and proficient as planet-shapers, and learned to use our technological skills to enhance the survival prospects not just of humanity but of all life on Earth. "

David Grinspoon

" In environments that are energy-rich but liquid-poor, like near the surface of Titan, natural selection may favor organisms that use their metabolic heat to melt their own watering holes. "

David Grinspoon

" 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. "

David Grinspoon

" If you were on the surface of Venus, assuming you could see the Sun, which, you know, would be hard because it's so cloudy there, but the Sun would actually rise in the west and set in the east. And, it would do so very, very slowly, because the planet rotates incredibly slowly. "

David Grinspoon

" We can look out on an alien landscape that no one has seen before and find it beautiful. "

David Grinspoon

" A lot of the science fiction that I grew up reading was written when we still thought that Venus might be an oceanic planet. "

David Grinspoon

" I'm an astrobiologist, and I come from a planetary science background, so in a very broad sense, I study the evolution of planetary environments. "

David Grinspoon

" I'd like to jump a couple hundred years into the future and work with the scientists who are getting back the first information from our probes to planets orbiting nearby stars. "

David Grinspoon

" I do comparative studies of climate evolution, and the interactions between planetary atmosphere and surfaces and their radiation environment, and try to understand the environmental factors that can affect a planet's habitability and how they change over time. "

David Grinspoon