On The Alien Question: Where Are They?

By Marcelo Gleiser

Published November 14, 2017 at 8:25 AM PST

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Marcelo Gleiser

Marcelo Gleiser is a contributor to the NPR blog 13.7: Cosmos & Culture. He is the Appleton Professor of Natural Philosophy and a professor of physics and astronomy at Dartmouth College.

See stories by Marcelo Gleiser