Leave it to renowned physicist Stephen Hawking to be the bearer of incredibly interesting yet wildly depressing news about the state of the world. In his forthcoming documentary for BBC, Expedition New Earth, Hawking predicts that planet Earth will only survive for the next 100 years. In other words, the world as we know it will be gone in the next century. This new documentary is all about the possibilities of life on Mars. Even more than that, it’s about colonizing Mars. Hawking has been talking about making Mars our new home for quite some time now. He thinks it’s more urgent than ever to consider an alternative planet, or as he calls it, “Planet B.” “With climate change, overdue asteroid