Universe Likely Has Many Extinct Civilizations: Study

Unless a typical civilization lasts much longer than ours, it's likely that others have gone extinct.

April 29, 2016
11:53 AM EDT
Two equations describing the possibilities of life: The famous Drake equation (top) and the newer equation by Adam Frank and Woodruff Sullivan. | University of Rochester
An array of Earth-sized planets. The four on the left (all artist's impressions) were discovered by the Kepler space telescope, while the one at far right is a picture of our own planet. The full list, from left to right, is Kepler-22b, Kepler-69c, Kepler-62e, Kepler-62f and Earth. | NASA Ames/JPL-Caltech


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