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  • C-SPAN 1

    NOW: Secretary of State John Kerry at the U.N. Security Council

  • C-SPAN 2

    NOW: After Words: Caleb Scharf

  • C-SPAN 3

    NOW: Discussion on President Nixon's National Security Council

Now on C-SPAN 2

After Words: Caleb Scharf

Caleb Scharf talks about his book The Copernicus Complex, in which he talks about the possible beginnings of life on earth and argues that earth and humanity are unique in the universe.

Started 11:59 ET