I think a lot of people interested in space exploration tend to hear stories about the great missions, how they work technically,… — David Grinspoon Exploration Copy Share Image
Humanity has at least a dim, and growing, cognisance of the effects of its presence on this planet. The possibility that we… — David Grinspoon Awareness Copy Share Image
You cannot study other planets without referring to Earth and without applying the techniques and the insights of Earth science. And you… — David Grinspoon Earth Copy Share Image
There is a real danger of unintended consequences, of encouraging people to give up. Pessimism, if it becomes a habit, can reinforce… — David Grinspoon Consequences Copy Share Image
Titan has rivers and lakes of liquid methane and ethane, methane weather systems of clouds and storms that mirror Earth's hydrologic cycle,… — David Grinspoon Copy Share Image
The more we look at the kinds of soils and the nature of the atmosphere and the polar caps, it all adds… — David Grinspoon Copy Share Image
The reason you see so many volcanoes on Venus is partly due to the fact that there's virtually no erosion there. So… — David Grinspoon Earth Copy Share Image
We definitely don't want to go through another Ice Age or another natural cycle of global warming. Both happen over a long… — David Grinspoon Age Copy Share Image
We have to learn to become a new kind of entity on this world that has the maturity and the awareness to… — David Grinspoon Awareness Copy Share Image
We're pretty sure there's plenty of organic material on Pluto. The atmosphere is largely methane, and in sunlight, methane builds organic molecules.… — David Grinspoon Copy Share Image
We've almost been wiped out as a species many times, going back millions of years, and we've survived by reinventing ourselves and… — David Grinspoon Awareness Copy Share Image
Venus and Mars are our next of kin: they are the two most Earth-like planets that we know about. They're the only… — David Grinspoon Mars Copy Share Image
I do comparative studies of climate evolution, and the interactions between planetary atmosphere and surfaces and their radiation environment, and try to… — David Grinspoon Change Copy Share Image
Thinking about the new epoch - often called the Anthropocene, or the age of humanity - challenges us to look at ourselves… — David Grinspoon Age Copy Share Image
It will be a long time, if ever, before we get to study Earth-like planets orbiting around other stars, so really, the… — David Grinspoon Copy Share Image
In my Ph.D. thesis, written in 1989, I discussed the fact that when a civilization develops the technology to prevent catastrophic asteroid… — David Grinspoon Evolution Copy Share Image
The planet Mars -- crimson and bright, filling our telescopes with vague intimations of almost-familiar landforms -- has long formed a celestial… — David Grinspoon Alien invasion Copy Share Image
When you think about alien intelligences making art, you then have to think about what art is and how bound up it… — David Grinspoon Art Copy Share Image
It's one of the big mysteries about Venus: How did it get so different from Earth when it seems likely to have… — David Grinspoon Astrobiology Copy Share Image
Among the radio astronomers of SETI - the Search for Extraterrestrial Intelligence - it's only sort-of a joke that the true hallmark… — David Grinspoon Astronomy Copy Share Image
Even as our unwitting alterations to Earth's carbon and hydrological cycles slowly make storms more damaging, our ability to monitor our planet… — David Grinspoon Ability Copy Share Image
If you were on the surface of Venus, assuming you could see the Sun, which, you know, would be hard because it's… — David Grinspoon Copy Share Image
We need visions of a future in which we have applied our infinite creativity to the task of living on a finite… — David Grinspoon Creativity Copy Share Image
