48 results
Comet Swarm

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.

Radio Dish

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.

Venus Express in orbit

Cosmic Relief with David Grinspoon

Farewell to a Friend

After a tremendously successful mission, Venus Express has orbited its last.

Planck temperature map of universe

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

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.

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