Yawning cools the BRAIN and does not function to oxygenate our blood, scientists claim
Yawning helps to cool the brain and does not function to oxygenate our blood, according to scientists, who also found vertebrates with larger brains yawn longer. Researchers from Utrecht University collected over 1,250 yawns from more than 100 species of mammals and birds by visiting zoos with cameras and waiting. They found a direct link between the … Read more