In the past, partial fossils of juvenile Cosmopolitodus ... These fossilized bones showed debilitating teeth marks on the dolphin's ribs that were attributed to Cosmopilitodus hastalis, per ...

A dolphin fossil believed to be at least 25 million ... under five minutes as an ancestor of whales and dolphins. “Their teeth were a little different, their habits were a little.

teeth and other skull parts. Because dolphins use ultrasonic waves to sense their surroundings, their ears are characterized by complicated structures. The fossil bore no similarities to other ...

This would have included animals as small as dolphins and as large as humpback whales ... rare in the UK and tend to be of poor quality. Almost all fossil remains of megalodon are teeth. Sharks ...