According to Canadian earthworm taxonomist John Warren Reynolds, there are 161 earthworm species at present in the United ...

Meet the leech, the misunderstood hero of aquatic ecosystems all over the world, who does not always suck blood!

An international team of scientists including B. Duygu Özpolat at Washington University in St. Louis has published the first single-cell atlas for Pristina leidyi (Pristina), the water nymph worm, a ...