A new scientific study provides many new insights into the biology of the prehistoric gigantic shark, Megalodon or megatooth ...

Skin attachment - Teeth are anchored to the skin by collagen fibers that run into the dentine from the dermis (in sharks). Each tooth touches the bone with the outer surface of the root, may be joined ...

It happens when your cervical spinal cord or nerve roots arising from it become compressed by the cervical vertebrae. Your cervical spine, or neck, is formed by seven small vertebrae that begin at ...

This element gave rise to the centrum in amniotes. At anterior end, below the notochord, is the intercentrum. Ichthyostegids (labyrinthodont amphibians) had vertebrae nearly identical with ...