Humans have many wonderful qualities, but we lack something that’s a common feature among most animals with backbones: a tail. Exactly why that is has been something of a mystery. Tails are useful for ...

(CNN) -- Humans have many wonderful qualities, but we lack something that's a common feature among most animals with backbones: a tail. Exactly why that is has been something of a mystery. CNN — (CNN) ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Humans have many ...

(CNN) — Humans have many wonderful qualities, but we lack something that’s a common feature among most animals with backbones: a tail. Exactly why that is has been something of a mystery. Tails are ...

(CNN) -- Humans have many wonderful qualities, but we lack something that's a common feature among most animals with backbones: a tail. Exactly why that is has been something of a mystery. (CNN) — ...

Ever thought why don’t humans have tails? It certainly is one of the marathon questions that scientists themselves have been racking their brains about for years. Whereas most of the other species ...

Geneticist Bo Xia asked that question as a child and it was on his mind again a few years ago, while he was recovering from a tailbone injury during his PhD at New York University (NYU) in New York ...