Do you think dinosaurs ever stood a chance against the asteroid that wiped off the mighty creatures? If they were sentient beings and could have protected themselves. Does humanity stand a chance when it comes to something like that...an asteroid so massive it can wipe out the entire planet?
The answer is yes, we actually might. Scientists at NASA are planning a mission to deliberately crash a spacecraft into an asteroid -- as a test run, in case a giant space rock is heading towards us to wipe out life on Earth one day.