Caleb Scharf

Caleb Scharf is the director of the Columbia Astrobiology Center and an adjunct associate professor of astronomy. He writes Scientific American’s Life, Unbounded blog and is the author of several popular books on astronomy, including, most recently, The Copernicus Complex.

Articles by this author

Whose Galaxy Is It?
Winter 2014-15 Whose Galaxy Is It?

As scientists discover further evidence that the Milky Way contains billions of Earth-like planets, a Columbia astronomer wonders what — or who — is out there.

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