Like spider monkeys, our ancestors’ tails helped them stay balanced in trees (Getty Images/iStockphoto) For half a billion years or so, our ancestors sprouted tails. Like fish, they used their tails ...

For half a billion years or so, our ancestors sprouted tails. As fish, they used their tails to swim through the Cambrian seas. Much later, when they evolved into primates, their tails helped them ...

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 ...

Most vertebrates in the animal kingdom sport tails of some sort. Birds and fish use their tails as steering mechanisms to glide through air and water respectively, geckos use their tails to store fat, ...

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