“Late this evening, NASA is launching a spacecraft the size of a refrigerator, sending it on a crash course with an asteroid in 2022 — and it’s all on purpose. This intentional self-destruction will tell us if slamming a spacecraft into an asteroid is enough to save Earth in the future if a massive space rock is headed our way.” (Saving the Earth “in the future” is just the kind of optimism we need this holiday season…)