Why can't we prevent asteroid strikes?

Asteroids: Yet more evidence that (as a society) we aren't very good at prioritizing preventative measures against long-term risks.

The other problem with fake vaccine scares

It's not just that bad information on the "dangers" of vaccines is working to reduce the number of children getting vaccines — a fact that affects herd immunity. Now, there's evidence that the fake scares (and efforts to debunk them) are getting in the way of scientists publishing real evidence about actual problems with certain vaccines. These aren't the kind of broad "vaccines are poison" claims you're familiar with. Instead, we're talking about legitimate science documenting side effects that are usually very rare, but still have an impact on certain subsets of the population and need to be addressed.

Follow along as Felix Baumgertner skydives from space

Felix Baumgartner is going to skydive from space today. At Popular Science, editor Jennifer Bogo is on site and live blogging the whole thing. As of 12:18 Central time, Baumgartner was in his capsule and preparing for the inflation of the balloon that will carry him into the stratosphere. From which he will jump.