Learn more about the human tailbone and how, even though we may not have a strict need for it anymore, it still helps us with our everyday lives.

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 ...

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 ...

Some hold with the theory that the development of an embryo shows the stages of evolution. In other words, what first develops is fishlike, and then like a small mammal, and then like a lemur or ape, ...

Humanity's ancestors have all had tails, but researchers may have identified the genetic mutation responsible for humans and certain primates losing the appendage, a new study suggests. A group of ...

On rare occasions, humans are born with tails—real functioning tails that can even be “wagged” via voluntary muscles contractions in response to emotional stimuli. Although the birth of a baby with a ...

A highly effective tail is needed in order for a sperm to be able to swim, and for a baby to be conceived. By using cryo-electron tomography, researchers have identified a completely new nanostructure ...

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