Earthworms Can Regenerate Into Two Separate Worms: Myth
It’s long been thought that earthworms have the ability to multiply when cut in half. Now whether this belief came from old wives’ tales or science fiction is unknown, but when it comes to regenerating an entirely separate organism, this myth is totally false.
Although earthworms do have the ability to regenerate, a new worm will not be formed if it’s cut. Earthworms have a distinctive head and tail, so if it’s cut below a point on it’s body called the clitellum, its tail will regenerate. Conversely, the separate tail portion will not regrow a head. The myth more than likely gets convoluted with a worm called the planarian flatworm that does have the ability to regenerate as an entirely new organism from smaller cut pieces. What’s even freakier is that the planarian retains all of its memories even after growing into new versions. Amazing!
“Will Two Worms Grow from a Worm Cut in Half?” Live Science