The vital tasks carried out by tiny "engineers" like earthworms that recycle waste and bees that pollinate crops are under threat because one fifth of the world's spineless creatures may be at risk of ...

Biologists used to assume that ribbon worms were short-lived, fragile creatures, the kind of invertebrates that flicker through a few breeding seasons and vanish. Then a single lab animal, known ...

Texas is home to some of the creepiest, crawliest, and otherwise oddest animals on the planet. We introduce you to them in What in Tarnation?!, an occasional series. The aptly named invertebrate is ...

An ancient, armored worm may be the key to unraveling the evolutionary history of a diverse collection of marine invertebrates. Discovered in China, a roughly 520-million-year-old fossil of the newly ...

The question of the origin of the vertebrates (including humans) from invertebrates is the most celebrated paternity suit in biology. Since they were first accused over a century ago, acorn worms ...

Not to toot my own horn, but I know a thing or two about bizarre animals. And I can tell you without a hint of doubt that the bobbit worm is by far the most bizarre. Growing to 10 feet long, the worm ...