Our happy hour fact to amaze your drinking buddies with.

hangoverResearchers finger the molecule in the brain that triggers hangovers.

Scientists at the University of Southampton in the U.K. ran tests on earthworms -- which have depressingly similar brains to humans when it comes to processing alcohol -- and were able to isolate the brain-signaling molecule that brings on headaches and nausea as the noggin readjusts to a lesser level of intoxication.

In the same study, they found that consuming a small dose of alcohol (you know it better as "Hair of the Dog") eased the pain of alcohol withdrawal. There is, however, evidence that this morning-after strategy can also lead to alcohol dependency.

Anyway, we've also found that the most satisfying hangover cure is calling in sick to work with a "stomach virus."