All around us, there are tiny creatures and simple organisms sharing planet Earth, including a type of worm that finds a home in rotting fruit. These microworms are about 1 millimeter long and transparent, barely visible to the human eye. Jihong Bai, a neurobiologist at the Fred Hutchinson Cancer Research Center, uses these microworms in his lab to study how neurons in the brain talk to each other. However, a chance observation of the worms led him to a new discovery about animal behavior. It