Humans’ closest primate relatives lost their tails about 25 million years ago, but exactly how has remained a mystery. A breakthrough in genetic research may finally offer answers.

When I get home at the end of the day, I am greeted by 35 pounds of bouncing fur and three tails wagging a mile a minute. After lots of rubs and kisses, my three Havanese dogs settle down for a ...

WASHINGTON — Our very ancient animal ancestors had tails. Why don’t we? Somewhere around 20 million or 25 million years ago, when apes diverged from monkeys, our branch of the tree of life ...

Researchers have identified more than 30 genes involved in the development of tails in various species, from an iguana’s long whip to the stub on a Manx cat. All of these genes are active in ...

Alligators can regrow severed tails, surprising scientists Young alligators can grow back up to 9 inches of a lost tail, a study finds. They’re the largest animal with this regenerative ability.

When compared to their nearest neighbors, the wolves, dogs wag their tails significantly more often, and from a much earlier age. This suggests that their wagging behavior evolved in line with ...

The tails are associated with spina bifida, a dangerous condition in which the canals of the spinal cord don’t entire close before birth, but they are often present without the disorder.

If humans had tails, what would they be like, and how would we use them? When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.