AOL.com Video - Lord Martin Rees on the Existence of Extraterrestrial Life

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Lord Martin Rees on the Existence of Extraterrestrial Life

Description:Chabot Space and Science Center President of the Royal Society, England's Astronomer Royal, Lord Martin Rees brings a lifetime of cosmological inquiry to a crucial question: What if human success on Earth determines life's success in the universe? He thinks that civilization's chances of getting out of this century intact are about 50-50. He is hopeful that extraterrestrial life already exists, but there's no sign of it yet. (3:56)

Source: FORA.tv Science

Tags: Martin Rees on Extraterrestrial Life , astronomy studies , Chabot Space and Science Center , communicating with aliens