Why Earth may someday look like Mars

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December 20, 2016 Today’s TED Talk Why Earth may someday look like Mars 11:55 minutes · TEDxBeaconStreet Every minute, 400 pounds of hydrogen and almost 7 pounds of helium escape from Earth's atmosphere into outer space. Astrophysicist Anjali Tripathi studies the phenomenon of atmospheric escape, and in this fascinating and accessible talk, she considers how this process might one day (a few billion years from now) turn our blue planet red. Watch now »   Playlist of the Day The lights and sounds of the universe Find out what sound a black hole makes, if (possible) alien life is blocking star light and other astounding things happening in our galaxy -- and beyond. Watch » 5 talks · Total run time 53:34 NEW ON IDEAS.TED.COM 70 books to make you feel hopeful: An end-of-year reading list Every minute, 400 pounds of hydrogen and almost 7 pounds of helium escape from Earth's atmosphere into outer space. Astrophysicist Anjali Tripathi studies the phenomenon of atmospheric escape, and in this fascinating and accessible talk, she considers how this process might one day (a few billion years from now) turn our blue planet red. Watch now »   Download the TED app

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