What is the life cycle of the hammerhead shark?

Hammerhead sharks tend to live for 20 to 30 years in the wild. While their migratory patterns have made tracking their feeding and breeding habits difficult in the past, GPS has helped marine biologists better monitor the creatures.

Hammerhead sharks tend to produce litters of 13 to 56 pups. The pups begin life as eggs that hatch inside their mother's body. There they feed through a placenta and umbilical cord, through which oxygen and nutrients from the mother's bloodstream are transferred. Once the pups are born, they must find their own food. They tend to live in large schools of pups until they reach adulthood.