This is true for all organisms with a well-developed nervous system, from human to worm. New research reveals how a tiny molecule called mir-79 regulates neural development in roundworms.

The second problem was that during development the worm begins to "twitch", moving around inside the egg. The folding and twisting makes it hard to track cells and parse out movement.

Researchers at Sinai Health have used a tiny worm to track how an animal’s brain changes throughout its lifetime, shedding new light on how human brains develop.