Sharks have roamed the open seas for close to half a billion years and have witnessed the Earth’s evolution from a primordial ...

The next shark on our list is much smaller. Cladoselache sharks measured only 4 feet (1.2 meters)! Their bodies were different to other sharks of the time, but were perhaps perfectly adapted to ...

Ptychodus went extinct around 85 million years ago. Coined the first real shark, Cladoselache lived more than 380 million years ago. While considered a shark, a Cladoselache has more in common ...