Millipedes are common arthropods that have two pairs of jointed legs on most body segments. For the most part, they’re slow-moving detritivores, which means they feed on decaying leaves and ...

But unlike other arthropods—like lobsters, spiders, or millipedes—insects have three pairs of jointed legs, segmented bodies, an exoskeleton, one pair of antennae, and (usually) one or two ...

They’re also one of the world’s largest arthropods, animals with no backbone, external skeletons, and multiple-jointed appendages. In this crab’s case, those appendages are its 10 legs.

For over a century, the Cambrian arthropod Helmetia expansa remained a mystery. Now, researchers have revealed how this ...

For over a century, the Cambrian arthropod Helmetia expansa remained a mystery. Discovered by paleontologist Charles ...