Is there anybody out there?
Here's what Hawking, and 32 other top physicists, had to say.
He thinks climate change, asteroid strikes, epidemics, and overpopulation will be our downfall.
Stephen Hawking has a suggestion.
Hawking appealed to Trump to make better choices regarding the environment and climate change.
"I thought no one would take me."
Stephen Hawking says we should fear aliens. Not everyone agrees.
The renowned scientist warns that we need to be ready for the robots.
It's time to start looking for some new worlds to visit.
It’s time to talk about how technology will really affect employment and the economy.
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