A comet screaming in from another star system carried alien ice ratios never seen before. What scientists found inside its spinning nucleus is reshaping how we picture worlds beyond our sun.
BBC Sky at Night Magazine on MSN
Who is Avi Loeb? Trump's lead UFO researcher talks alien life and what would happen if we find we're not alone
Astronomer Avi Loeb gives his thoughts on the prospect of finding signs of intelligent life beyond our Solar System.
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