Alien life may have evolved just after Big Bang

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Credit: zeenews.india.com/


Alien life may have evolved just after Big Bang

New York: Exoplanets may have been teeming with alien microbial life just 15 million years after the Big Bang, according to a Harvard scientist.

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 Bang that created the universe 13.8 billion years ago, said astrophysicist Abraham Loeb from the Harvard University.

This suggests that Earthlings may be extreme latecomers to a universe full of life. The earliest evidence of life on Earth dates from 3.8 billion years ago, about 700 million years after our planet formed.

The universe was a much hotter place just after the Big Bang. It was filled with sizzling plasma - superheated gas - that gradually cooled.

The first light produced by this plasma is the cosmic microwave background radiation (CMB) that we observe today, which dates from about 389,000 years after the Big Bang.
                                                                                      
Now, the CMB is freezing cold - around minus 270 degrees Celsius. It cooled down gradually with the expansion of the cosmos, and at some point during the cooling process, for a brief period of seven million years or so, the temperature was just right for life to form.  Read more >>


Source: http://zeenews.india.com/news/space/alien-life-may-have-evolved-just-after-big-bang_908556.html

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