Generally, shark eggs have curly tendrils at the ends or are covered in fibres, whereas ray eggs are usually squarer with horns protruding from the corners. This is an egg case of a bottlenose skate ...

The earliest fossil evidence for sharks or their ancestors are a few scales dating to 450 million years ago, during the Late Ordovician Period. “Shark-like scales from the Late Ordovician have been ...

Paleontologists have unearthed the nearly complete fossil of a colossal shark that prowled the ancient seas some nine million years ago. The fossilized remains belong to Cosmopolitodus hastalis ...

A new study provides many new insights into the biology of the prehistoric gigantic shark megalodon (megatooth shark), which ...

“Although we still need direct fossil evidence, our new study suggests that it is more likely than not that megalodon must have been more slender than the modern great white shark in terms of ...

Remarkably, fossil shark teeth are also incredibly abundant. Sharks ruled the earth's oceans for 400 million years, and every individual grows and sheds thousands of teeth in their lifetime. How ...

The fossil is from the left side an upper jaw, Godfrey also said, adding that the size of the tooth indicated that the shark — considered by scientists to be a "transoceanic superpredator," acco ...

Some modern shark species, like the Japanese bullhead, also have small blade-like parts on its dorsal fin. After the fossil’s discovery last year, other fossils found in the general vicinity ...

“The fossil discoveries in Mammoth Cave continue to reveal a wealth of new information about ancient shark species,” said Superintendent Barclay Trimble. “Researchers and volunteers ...