Researchers have discovered how the brain of the largest animal group evolved after finding the remains of a microscopic, worm-like creature that lived half a billion years ago.
The creature died while still in its early development, or larval stage, and belongs to a new species named Youti yuanshi, which combines the standard Chinese words "yòutǐ," meaning "larva," and "yuánshǐ," meaning "primitive," according to a new study published Wednesday (July 31) in the journal Nature.
