shows a hippo mid-yawn next to a unsuspecting heron. The photo was taken at Kruger National Park in South Africa. Ten other photos were recognized as "highly commended." These include photos ...

Several photos in this year's contest captured perfectly timed optical illusions. One award-winning photo looks like a hippo is about to eat a heron, but the hippo is just yawning. In "Three ...

Why people yawn is a mystery. But yawning starts in the womb. Past studies have used ultrasound images to show fetuses yawning, but some scientists have argued that real yawns were getting ...