A giraffe has the same number of neck bones as a human, roughly seven vertebrae.

The longer version

The neck of a giraffe looks impossibly long, yet the skeleton behind it follows the same basic plan found in almost every mammal. Cervical vertebrae are tightly constrained during development, and adding or removing one tends to disrupt the nerves and muscles that serve the head.

Instead of adding bones, evolution simply stretched each one. Muscle attachments, ligaments and a specialised cardiovascular system do the rest. A powerful heart generates high pressure to push blood up that column, while valves and elastic vessels stop the flow from rushing back down when the animal lowers its head to drink.

Where this entry sits

This collection gathers small surprises about mammals, reptiles, amphibians, birds, fish, insects, and the pets living alongside people. Expect odd details about senses, anatomy, and everyday behaviour that many people never notice in the animals around them. The full list sits on the Animals page, where every entry is listed in order.