Why do giraffes have such long necks, and how does blood reach their heads?
Giraffe's Power Pump
Why do giraffes have such long necks, and how does blood reach their heads?

A giraffe is basically a horse that asked, "But what if my neck went on forever?" Standing tall on the savanna, it carries a neck so long it looks like a misprint. But that neck isn't a fashion choice — it's a problem-solving machine, and it comes with a plumbing puzzle so wild that engineers still find it impressive.
First, the big surprise. A giraffe's neck has exactly seven bones — the same number as in your neck, and a mouse's neck, and almost every mammal alive. The giraffe didn't add extra parts. It just stretched the parts it had, each bone growing long like a row of taffy pulled tall.
