This cross section through the head of a jumping spider shows off the interior structure of four of its eight eyes. Jumping spiders have the most acute vision of any terrestrial invertebrate. In fact, ...

where the legs connect to the body. The base of the fiddle typically covers the head, with the neck extending down toward the abdomen. The venom of brown recluse spiders is both cytotoxic and ...

Sea spiders can regrow body parts after amputation and not just limbs, according to a study released on Monday that may pave the way for further scientific research into regeneration.