SUNSET: 
Cosmic Relief with David Grinspoon
Mars and Our Expectations
The Red Planet has inspired a long history of brilliant mistakes.
Cosmic Relief with David Grinspoon
Thank Our Lucky Planets: How Planets Really Do Shape Our Fate
Human history has always been linked to the influence of distant orbits, from climate change (past and present) to our exploration of the solar system.
Cosmic Relief with David Grinspoon
Mars Reconnaissance Orbiter: Ten Years Over Mars
It’s easy, but wrong, to take for granted a mission that’s still going strong after a decade.
Cosmic Relief with David Grinspoon
The Golden Spike of Tranquility Base
A modest proposal: the golden spike that marked the beginning of the Anthropocene was the first lunar landing in Mare Tranquilitatis.
Cosmic Relief with David Grinspoon
International Space Station: Our Year In Space
ISS astronauts are reviving our passion for space travel in novel ways.
Cosmic Relief with David Grinspoon
Could It Be: Possible Signs of Extraterrestrial Intelligence?
We need to learn how to talk about possible signs of extraterrestrial intelligence.
Cosmic Relief with David Grinspoon
No Need to Feel Lonely
Are we alone in the universe? Recent results don't support that conclusion, despite what the headlines say.
Cosmic Relief with David Grinspoon
Sidewalk Wisdom: Isaac Asimov on Biology
Musing on a long-lost Asimov gem.
Cosmic Relief with David Grinspoon
Farewell to a Friend
After a tremendously successful mission, Venus Express has orbited its last.
Cosmic Relief with David Grinspoon
Climate Change & the Big Payback
We’re causing a mass extinction now. Can we prevent the next one?
Cosmic Relief with David Grinspoon
In the Days of the Comet
A comet’s close passage to Mars reminds us of our own vulnerability.
Cosmic Relief with David Grinspoon
Cosmology Gets Real
An astrobiologist comes to grips with the new cosmology results.
Cosmic Relief with David Grinspoon
Looking Back at Earth in Wonder
Seeing Earth as a dot helps prepare us for the exoplanets.
Cosmic Relief with David Grinspoon
So Many Worlds, But Is Anybody Home?
Kepler’s findings of Earth-like worlds furthers the motivation for SETI.
Cosmic Relief with David Grinspoon
Search for Intelligent Worlds
To find extraterrestrial intelligence we should look for engineered exoplanets.
Cosmic Relief with David Grinspoon
It’s Not About Pluto: Exoplanets Are Planets Too!
Recent discoveries have exposed the absurdity of the IAU’s planet definition.
Cosmic Relief with David Grinspoon
Cosmic Optimism
Our galaxy is likely to contain an increasingly large number of advanced civilizations.
Cosmic Relief with David Grinspoon
One Galactic Year from Now
Will the Anthropocene be an event, an era, or a transition?
Cosmic Relief with David Grinspoon
Life on Saturn’s Moons?
Two worlds will allow us to test contrasting views of planetary habitability
Cosmic Relief with David Grinspoon
It All Started with Mariner 2
Fifty years ago this August, with the launch of Mariner 2 toward Venus, something profoundly new appeared around the Sun.
