24 results
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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