Radoslav Klein
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earthyday: The Soul Nebula 2015 - By Darren Knight

The universe may be a lonelier place than previously thought. Of the estimated 100 billion galaxies in the observable universe, only one in 10 can support complex life like that on Earth, a pair of astrophysicists argues. Everywhere else, stellar explosions known as gamma ray bursts would regularly wipe out any life forms more elaborate than microbes. Complex life may be possible in only 10% of all galaxies | Science/AAAS | News