Earth will turn into fireball in 600 years: Stephen Hawking
British physicist Stephen Hawking has warned that growing population and power consumption would turn Earth into a fireball in less than 600 years. To ensure survival for another million years, humans must "boldly go where no one has gone before," Hawking said. The 75-year-old appealed investors to back his venture Breakthrough StarShot to travel to Sun's nearest star Alpha Centauri.