While giving birth to live young is a trait that most people associate with mammals, this reproductive mode—also known as viviparity—has evolved over 150 separate times among vertebrates, including ...

Maybe you've seen a "mermaid's purse" while walking on the beach. Not actually an accessory for the mythical creature, these small casings are the eggs of sharks and their relatives For around 455 ...

The last two decades have seen an increase in reports of a sea creature so terrifying that it has earned its own low-budget film franchise: the two-headed shark. Every few years, these menacing ...

Tom has a Master's degree in Journalism. His editorial work covers anything from archaeology and the environment to technology and culture. Tom has a Master's degree in Journalism. His editorial work ...

Scientists are getting better at keeping premature baby sharks alive in aquariums—a boon when captive sharks give birth early, or when aquariums receive donations of living shark fetuses taken from ...

This article was originally featured on Hakai Magazine, an online publication about science and society in coastal ecosystems. Read more stories like this at hakaimagazine.com. When a shark is born ...

Urea—the main component of human urine—plays an important role in the timing of maturation of sharks, rays and other cartilaginous fish. A new study by researchers with the Sea Around Us initiative at ...

Did you know there are more than 500 species of sharks out there in the world? These fascinating underwater creatures have been swimming in our seas for about 455 million years, and they can travel ...