wondering about things I know nothing about...

Neutrinos. They started out supposedly massless, but then it was decided they have mass. What if sometimes they do, and sometimes they don't? Also, if they didn't have mass, they would travel at the speed of light. What if sometimes they did, and sometimes they didn't?

It is important to wonder about things you know nothing about, because it allows you to believe you may be clever while you are finding out about them.