For megalodon shark moms, having cannibalistic progeny in the womb would have been tough, since the sharks had to expend a lot of energy to nourish pups so large.

Giant Ancient Sharks Had Enormous Babies That Ate Their Siblings in the Womb Some sharks lay eggs, while others give birth to live young. In most sharks, however, the eggs hatch inside the mother.

These extinct sharks gave birth to some really large babies – about the size of a full-grown human adult. At birth, megalodons were about 6.6 feet, or 2 meters, in length, according to a study ...

When a shark is born prematurely, salt water is toxic to its tiny body. A preemie baby shark can’t yet regulate the salt levels in its blood and will often die within a few hours. So researchers ...

The largest sharks ever to hunt in Earth’s oceans may have gotten so big thanks to their predatory behavior in the womb, scientists report October 4 in Historical Biology.. The idea emerged from ...

The team also suggested that the embryo had eaten other eggs while in the womb, helping it to grow so large. While it sounds shocking, such "intra-uterine cannibalism" is common in modern sharks .

Preemie sharks that would otherwise die get by with a little help from a human-made womb. This article was originally featured on Hakai Magazine, an online publication about science and society in ...

For as much time and money as people have spent studying and filming great white sharks, no one has ever witnessed one being born.But new footage out of California might be the next best thing. On ...

These cannibal baby sharks eat their siblings in the womb 01:27. As adults, sand tiger sharks are known for being relatively non-aggressive. But as babies, these animals engage in a cannibalistic ...

Preemie Sharks Get by With a Little Help From an Artificial Uterus Scientists manufactured a womb that could potentially help bolster populations of endangered shark ...