Caleb Scharf
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Caleb Scharf

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Caleb Scharf is an astrobiologist and recipient of the 2022 Carl Sagan Medal. He was Director of Astrobiology at Columbia University in New York and is now the Senior Scientist for Astrobiology at the NASA Ames Research Center in Silicon Valley. His popular science books include Gravity's Engines, The Copernicus Complex, The Zoomable Universe, The Ascent of Information, and (in 2025) The Giant Leap. He is also author of more than 120 scientific papers and over 500 popular science articles published by Scientific American, Nautilus, Aeon, and more. He is a frequent consultant and speaker for TV and live audiences.
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Gravity's Engines

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  • Gravity's Engines Audiobook By Caleb Scharf cover art

    • Gravity's Engines

    • How Bubble-Blowing Black Holes Rule Galaxies, Stars, and Life in the Cosmos
    • By: Caleb Scharf
    • Narrated by: Caleb Scharf
    • Length: 7 hrs and 56 mins
    • Release date: 08-07-12
    • Language: English
    • 222 ratings

    $17.24 or free with 30-day trial

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  • The Copernicus Complex Audiobook By Caleb Scharf cover art

    $14.99 or free with 30-day trial

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  • The Ascent of Information Audiobook By Caleb Scharf cover art

    $18.00 or free with 30-day trial

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