The Martian's Andy Weir: "Aliens Do Not Exist On Mars"

Having an opinion on aliens is the one thing Stephen Hawking, Edward Snowden and The Martian author, Andy Weir, all have in common.

Weir, a self-confessed space geek, doesn't believe that they exist on Mars.

He joined us for a chat through Google Hangout and his enthusiasm for space and all it entails, is boundless.

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Despite his vast knowledge of the extraterrestrial world, carefully acquired through years of research, he is patient to give a detailed explanation of his beliefs, however out-of-vogue they may seem.

This includes a percolating opinion that Hawking is wasting his time trying to find aliens and that Mars One candidates are all a little...well, let us just say he doesn't compliment them.