Scientists don't know if many birds 110 million years ago looked like a duck, walked like a duck, or quacked like a duck, but they're now sure of one thing—some had webbed feet.
Researchers discovered the fossil tracks of an otherwise unknown bird in sediments near Jinju, South Korea. The scientists, who described their find in the June 21 online issue of Naturwissenschaften, say the imprints push back evidence of web-footed birds by at least 25 million years.
Birds probably laid down the tracks as they waded in mud, wet sand, or shallow water to search for food, says Jong-Deock Lim of the Natural History Museum at the University of Kansas at Lawrence. The areas between the mystery birds' toes were