Secrets of Bones

Evolutionary biologist and master skeleton builder Ben Garrod takes a look at how bones have allowed vertebrates to dominate most habitats on Earth throughout history. Garrod explains what bones are constructed from and how they can support animals of all sizes, from a frog just a few millimetres long to blue whales that can grow to be 30 metres long. Other topics the presenter covers include how the skeleton has adapted for vertebrates to move on land.