Emma Bernard, a fossil fish expert at the Museum, explains the reasons behind the unusual shape in the video below. There are more viviparous shark species - which bear live young - than sharks that ...

Lemon sharks are viviparous, in that they give birth to live young, so when a pup is born it is already a fully formed miniature shark. The mother will risk stranding herself in shallow waters to ...

Fossilized shark skeletons are extremely rare ... but it's not clear if they were ovoviviparous or viviparous. Ovoviviparous means the eggs remain in the mother until they hatch, whereas ...

The biggest, most formidable shark to have ever roamed the ocean may have been even larger than previously thought, according to a new study. The research, published Sunday in the journal “ ...