It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Some features of ATS will be disabled while you continue to use an ad-blocker.
(visit the link for the full news article)
Researchers at the State University of New York in Albany found that yawning boosts blood flow and chills the brain. Vessels in the nasal cavity send cool blood to the brain during a yawn, making it operate more efficiently, said Dr Gordon Gallup, who led the study.
..."According to our hypothesis, rather than promoting sleep, yawning should antagonise sleep," he said.
The researchers also have an explanation for why yawns are so contagious...