Shutterstock People tend to think of sharks as large, frightening predators with sharp teeth, so it might come as a surprise to learn that some shark babies grow in the same way as humans – attached to the mother by an umbilical cord and plac
Male seahorses grow placentas to incubate their young science.org - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from science.org Daily Mail and Mail on Sunday newspapers.