Posted on 5 Dec 00 by FmH If you yawn, you’re a human dynamo. The purpose of the yawn examined. The Sunday Times of London Share Print (Opens in new window) Print Email a link to a friend (Opens in new window) Email MorePocket Share on WhatsApp (Opens in new window) WhatsApp Share on Telegram (Opens in new window) Telegram Tweet Share on Reddit (Opens in new window) Reddit Like Loading... Related