Stephen Hawking says this is the most dangerous time for our planet
Stephen Hawking: 'We eat too much and move too little'
Stephen Hawking thinks humans won't last 'another 1,000 years' on Earth
Stephen Hawking warns artificial intelligence could be disastrous for humanity
Stephen Hawking: 'Human race has no future' without space travel
More than 300 scientists warn over Trump's climate change stance
Stephen Hawking wants to explore the star system where scientists just found an Earth-like planet
Scientists discover Earth-like planet orbiting star closest to our sun in 'habitable zone'
Stephen Hawking's famous prediction about black holes was just observed for the first time ever
Stephen Hawking warns about threats facing humanity in light of Brexit vote
Stephen Hawking opens up about the greatest threats to humanity
Stephen Hawking on black holes: 'There is a way out'
Even Stephen Hawking can't explain Trump's popularity
Stephen Hawking: Black holes could be portals to other universes
Stephen Hawking and billionaire investor Yuri Milner want to use the 'Silicon Valley approach to space' to find life beyond our planet
Stephen Hawking: Humans may not survive another 100 years
Stephen Hawking says women are the 'most intriguing' mystery
The software that lets Stephen Hawking talk is now free