To the casual observer on a photo safari, the giraffe is an iconic, gentle giant browsing the acacia tops. But to a cardiovascular physiologist, a giraffe is a walking, breathing hydraulic paradox.

But this extreme feature comes at a cost: namely the energy required for the heart to pump blood up to the head against gravity. As a result, giraffes have high blood pressure, more than twice that of ...

All the Latest Game Footage and Images from Giraffe Evolution Long neck, camel-like shape, leopard-like coloring and horn-like ossicones don’t come out of nowhere: giraffes are naturally bizarre. What ...

Giraffes may look peaceful, but their biology tells a different story. With devastating neck strikes and kicks strong enough to kill lions, they’re far from defenseless. This breakdown explores ...