Why Do Bigger-Brained Animals Have Longer Yawns? - The Atlantic

The Atlantic

Why Do Bigger-Brained Animals Have Longer Yawns? The Atlantic How, incidentally, can you tell if an animal is yawning? It's surprisingly easy. When you yawn, you typically open your mouth quickly, stretch your facial muscles, inhale deeply, close your eyes, and tilt your head back. You can see the same set of ... and more »