Stephen Hawking warns we are at risk of destroying Earth

'We are at the most dangerous moment in the development of humanity': Stephen Hawking warns we are at risk of destroying Earth We are living through the most dangerous time in the history of the human race, according to Professor Stephen Hawking. The Cambridge University physics professor named overpopulation, climate change and diseases as just some of the threats facing our planet. He said we have developed technology that could destroy Earth, and we must'retrain' for a new world where robots have replaced many everyday jobs. We are living through the most dangerous time in the history of the human race, according to Professor Stephen Hawking. Writing in a comment article in The Guardian, Professor Hawking explained what worries him about the future of our planet.