Sharks are more ancient than dinosaurs
Sharks are fish which have cartilages rather than bones. These fish evolved earlier than dinosaurs, which were reptiles. The fossil...
Reptiles
The earliest known bird
The archaeopteryx is considered to be the earliest bird and it is the link between birds and reptiles. The archaeopteryx...
Tooth regeneration in crocodiles
Crocodiles have 24 sharp teeth on each jaw, which are meant to grasp and crush, not to chew. The teeth...
