“Time for morning gymnastics. That’s how Worm stays in good shape.” Emerging from beneath a book, a pink earthworm with a large round eyeball guides readers on a daylong shape-spotting excursion. To ...

Sport junkie or couch potato? Always on time or often late? The animal kingdom, too, is home to a range of personalities, each with its own lifestyle. Biologists report on a surprising discovery: even ...

Blackworms (Lumbriculus variegatus) are distant relatives of rainworms, measuring up to 10 cm long. They live in shallow marshes, ponds, and swamps in Europe and North America, where they feed on ...