Advances in genetics are allowing researchers to probe the complexity of life on Earth Pop quiz: How many arms do sea stars have? The answer seems obvious: one, two, three, four, five. Five arms.

Despite what it looks like, researchers found recently that starfish don’t have limbs that are hugging the surface they touch — the characteristic starfish is actually mostly “just a head.” What did ...

Reprinted from Australian Journal of Marine and Freshwater Research 43/3 1992. "Papers from a symposium on Reproduction, Recruitment and Hydrodynamics in the Crown-of-thorns Phenomenon, held on 22-23 ...

Pop quiz: How many arms do sea stars have? The answer seems obvious: one, two, three, four, five. Five arms. Anyone who has stumbled across one splayed on the seashore knows this. But if that is your ...