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" 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
Reading
Science
Up
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" It's quite possible there's as much lightning on Venus as on Earth. "
David Grinspoon
Earth
Possible
Venus
" Now, humans have become a dominant force of planetary change and, thus, we may have entered an eon of post-biological evolution in which cognitive systems have gained a powerful influence on the planet. "
David Grinspoon
Change
Evolution
Influence
" There's something cool about being involved in new missions to other planets. "
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Cool
Something
Planets
" We definitely don't want to go through another Ice Age or another natural cycle of global warming. Both happen over a long period of time. It would be disastrous for our civilization, and not just for us but many other species. "
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Go
Time
Want
" Earth is a stunningly lovely planet for so many reasons. Among these is the wondrous presence of curious, artful, inventive humanity. "
David Grinspoon
Many
Presence
Humanity
" 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
Rise
Know
Cloudy
" Titan has rivers and lakes of liquid methane and ethane, methane weather systems of clouds and storms that mirror Earth's hydrologic cycle, and seasonal cycles that rival Earth's in complexity. "
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Mirror
Storms
Clouds
" Mars does not belong to 'America,' nor to Earth, nor to human beings. "
David Grinspoon
America
Belong
Earth
" I think Pluto has to be considered among the places in the solar system that are possible homes for life. "
David Grinspoon
Places
Think
Solar
" We have all this very clever technology and all these abilities to manipulate the world in all these ways, yet we are faced with the very real question of whether we can be sustainable on this planet - whether or not, in fact, we can endure. "
David Grinspoon
Technology
Question
Clever
" We're going to get off fossil fuels, no question. We may not do it quickly enough to avoid some pain, and I'm quite worried about that. But by the 22nd century, there's no way we'll be on fossil fuels. "
David Grinspoon
Enough
Off
Pain
" Whenever I see a nighttime picture of Earth from space, with its glowing lights, I am stirred by its beauty. "
David Grinspoon
I Am
Beauty
Space
" I think chemists always think they know more than they know, because nature has a lot of possible pathways it can try. "
David Grinspoon
Try
Always
Know
" When I first went to college, I went into physics, and my goal was to help perfect nuclear fusion so I could solve the energy crisis and global warming. I probably would have done it, too, if I'd stuck to it. "
David Grinspoon
College
Help
Perfect
" 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
Perspective
Space
Science
" 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
Young
Now
Solar
" Humanity has at least a dim, and growing, cognisance of the effects of its presence on this planet. The possibility that we might integrate that awareness into how we interface with the Earth system is one that should give us hope. "
David Grinspoon
Growing
Earth
Presence
" In order to have a decent chance to be a communicating species, you would have to learn to think and plan and act over time scales of a century or a millennium. "
David Grinspoon
Time
Learn
Think
" I think the best SF writers are very aware of what we, in the scientific community, are doing, thinking, and discovering. "
David Grinspoon
Think
Thinking
Community
" We can look out on an alien landscape that no one has seen before and find it beautiful. "
David Grinspoon
Landscape
Look
Find
" Through space-based climate studies, my colleagues and I have learned that a stable and comfortable climate is not something to take for granted. "
David Grinspoon
Take For Granted
Colleagues
Through
" 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
Technology
Fact
Evolution
" 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
Fast
Cloud
You
" I will defend the NASA Earth Science Division with everything I've got. "
David Grinspoon
Earth
Division
Science
" As a young planet, Venus was losing hydrogen rapidly to space. The oceans boiled off, and after some period of time, perhaps 600 million years, there was no surface water. "
David Grinspoon
Time
Years
Losing
" 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
Favor
Heat
Natural
" As long as we can imagine a better path, of course we are obligated to seek it. This is why unwarranted pessimism about our future is actually irresponsible. "
David Grinspoon
Better
Why
Path
" What we should really be thinking about is what it would look like for a truly intelligent technological species to be interacting with their planet's atmosphere. "
David Grinspoon
Look
Thinking
Intelligent
" I was a science fiction geek from an early age, enthralled by the questions of life in the universe. As I got older, I learned that space exploration was real. I wanted to get involved in that. I knew I wanted to be a scientist. "
David Grinspoon
Space
Age
Life
" 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
Sun
Past
Long