Are We Alone – Off to the Traces

by Gary Niederhoff on October 25, 2010

If a tree feel on another planet, would we be able to detect it? Not quite yet – but we might be able to tell if the planet was habitable. A living-planet is the promise of newly-discovered Gliese 581g. But does the planet exist at all?

Discover how we learn a planet’s geology and chemistry from afar. Also, what we learn about a civilization from what it discards, beginning with our own sloppy habits.

Plus, the hunt for derelict alien spaceships… and a man who sketches alien creatures for a living – based on real science.

Listen to individual segments here:

Part 1: Lisa Kaltenegger – Gliese 581g.
Part 2: Brad Bebout – Microbial mats.
Part 3: Robin Nagle – Our legacy of trash.
Part 4: Robin Hanson – Hints of alien diaspora.
Part 5: Joel Hagan – Creating aliens.

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