Most of the natural disasters of horrific scope (massive volcanic eruptions that freeze the planet etc.) we can do nothing about, practically. Asteroid avoidance is one that we can. We are spending next to nothing on that.
Another is a flip of the magnetic field, and the field has weakened 10% in the last few decades. Don't be around when that happens, or when a supernova happens in our neighborhood. At least don't be outside. The killer rays will get you.
Just because one doesn't read about something in the newspaper doesn't mean we aren't spending money on it. I am no longer privy to the information, but we had a workable defense system in the early eighties, so I imagine that by now it is much better. "Star Wars" as the press dubbed it, exists and was created more for such a purpose (and related purposes that I cannot go in to)than to defend against ICBMs.