AnimalsInterestingSome shark species experience appetite suppression around the time they give birth, which may help prevent them from eating their own pups.3201k
AnimalsMind-BlowingSharks can detect fish heartbeats using electroreceptors called ampullae of Lorenzini that sense electrical fields as small as five billionths of a volt.401k
AnimalsWeirdHelicoprion was a shark-like fish that lived 270 million years ago. It grew up to 4-8 meters long and had a bizarre spiral whorl of teeth on its lower jaw, unlike anything seen in modern animals.354k
AnimalsMind-BlowingMegalodon was the biggest shark that ever existed. It was larger than the average city bus and could bite down with a force between 10.8 and 18.2 tons - enough to crush a prehistoric whale's skull as easily as a grape.283k
AnimalsMind-BlowingDolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.192k