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 ...

As a result, scientists often infer the appearance and behaviour of these animals from fossil teeth and scale which are much more common but less informative. This makes investigating rare shark ...

As a result, scientists often infer the appearance and behavior of these animals from fossil teeth and scales, which are much more common but less informative. This makes investigating rare shark ...

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 ...