Imagine a world covered in thick ice, hiding an ocean bigger than all of Earth's seas combined. That is Jupiter's moon Europa, long hailed as one of the best bets for alien life in our solar system.
Scientists are listening in on sperm whale conversations and studying Earth's strangest microbes to prepare humanity for ...
BBC Sky at Night Magazine on MSN
What would aliens really look like? Here's what the science says. And no, it's not little green men.
We talk to astronomer Professor Jon Willis about what form alien life may take based on evidence we find on Earth ...
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