Scientists have long sought to understand why sea spiders keep some of their most important organs in their legs. By Veronique Greenwood The knotty sea spider has a fundamental physical difference ...

Scientists have decoded the sea spider’s genome for the first time, revealing how its strangely shaped body—with organs in its legs and barely any abdomen—may be tied to a missing gene. The detailed ...

Sea anemones may hold the key to the ancient origins of body symmetry. A study from the University of Vienna shows they use a molecular mechanism known as BMP shuttling, once thought unique to ...