DucreuxyawnMonday afternoon, I couldn’t stop yawning. Sure, I was tired – I’ve been writing thousands of words a day on top of endless little bits and pieces of translating that keep dribbling in – but this was unusual. Later that afternoon, I saw this:

Yawning may no longer be a wide open question

Worth a click. I wasn’t aware that yawning was one of the great unsolved problems of science.

A dentist from the University of Maryland School of Dentistry (Gary Hack) and a Princeton postdoc (Andrew Gallup) claim that we don’t yawn because we’re tired, sleepy, or need more oxygen.

No, they say, we yawn in order to cool down our brains. Continue reading