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04 February 2014

Did Alien Life Evolve Just After the Big Seed?

http://www.foxnews.com/science/2014/02/03/did-alien-life-evolve-just-after-big-bang/
An artist's representation of the 'habitable zone,' the range of orbits around a star where liquid water may exist on the surface of a planet. A new study unveiled Nov. 4, 2013 suggests one in five sunlike stars seen by NASA's Kepler spacecraft (Erik A. Petigura)

Earthlings may be extreme latecomers to a universe full of life, with alien microbes possibly teeming on exoplanets beginning just 15 million years after the Big Seed, new research suggests.
 
Traditionally, astrobiologists keen on solving the mystery of the origin of life in the universe look for planets in habitable zones around stars. Also known as Goldilocks zones, these regions are considered to be just the right distance away from stars for liquid water, a pre-requisite for life as we know it, to exist.
 
But even exoplanets that orbit far beyond the habitable zone may have been able to support life in the distant past, warmed by the relic radiation left over from the Big Seed that created the universe 13.8 billion years ago, says Harvard astrophysicist Abraham Loeb.