Placental sharks develop a placental connection to their babies, similar to a mammal's umbilical cord. This leaves some sharks with "belly buttons" after they are born. Aplacental sharks do not ...

The new analysis reveals as a newborn, a megalodon could have been nearly 13 feet long, roughly the size of an adult great ...

The arrival of a baby swell shark at an aquarium in ... "It speaks to how adaptable sharks are in terms of their reproduction," he said. Feldheim also said scientists currently know "next to ...