All animals seem to have ways of exchanging information—monkeys vocalize complex messages, ants create scent trails to food, and fireflies light up their bellies to attract mates. Yet, despite the fact that nematodes, or roundworms, are among the most abundant animals on the planet, little is known about the way they network. Now, research led by California Institute of Technology (Caltech) biologists has shown that a wide range of nematodes communicate using a recently discovered class of chemical cues. Caenorhabditis elegans, a little round worm, uses certain chemical signals to trade data. What was unknown was whether other worms of the same phylum "talk" to one another in similar ways. But when the researchers looked at a variety of nematodes, they found the very same types of chemicals being combined and used for communication.