Ideas worth spreading

3,067,881 views | Martin Rees • TEDGlobal 2005

Is this our final century?

Speaking as both an astronomer and "a concerned member of the human race," Sir Martin Rees examines our planet and its future from a cosmic perspective. He urges action to prevent dark consequences from our scientific and technological development.

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This talk was presented at an official TED conference. TED's editors chose to feature it for you.

Speaking as both an astronomer and "a concerned member of the human race," Sir Martin Rees examines our planet and its future from a cosmic perspective. He urges action to prevent dark consequences from our scientific and technological development.

This talk was presented at an official TED conference. TED's editors chose to feature it for you.

About the speaker

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Lord Martin Rees, one of the world's most eminent astronomers, is an emeritus professor of cosmology and astrophysics at the University of Cambridge and the UK's Astronomer Royal. He is one of our key thinkers on the future of humanity in the cosmos.

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