Take a broader look at our species' place in the universe, and it becomes clear that we have an excellent chance of surviving for tens, if not hundreds, of thousands of years.

But just because you are paying tens, if not hundreds, of thousands of dollars for your child's education does not mean the university is a safe place.

The worst nuclear power accident in history took place in Chernobyl in 1986 when a reactor there exploded, killing tens of people instantly and exposing hundreds of thousands more to radiation.