Scientists are currently searching for the Higgs boson — a massive scalar elementary particle — because if they find it they will prove once and for all that matter exists. Most people just seem to accept the existence of matter without contemplating the theoretical problems it causes, but scientists are not so foolish. If you ever wonder why scientists are so distant to their wives and children, it’s because until the Higgs boson is found, they can’t rationally be sure they’re there. Anyway, scientists are pretty sure the Higgs boson is out there, but to distinguish it from made up things people believe in, like the Tooth Fairy and morality, they need concrete proof.
To find the Higgs boson, scientists have constructed the Large Hadron Collider. The Small Hadron Collider, the Medium Hadron Collider, and the Fun-Size Hadron Collider all failed to locate the Higgs boson, but they’re pretty sure the Large one will do it. There is a small chance (one in six) that the Collider could create black holes and destroy the universe, but Science! has already shown we have 10^10^16 universes, so that’s not really a big deal.
Anyway, if you happen to see a Higgs boson, make sure to tell your nearest scientist. And be detailed in your description (height, weight, etc.).