Classical conditioning has been demonstrated in a handful of previous studies in starfish. But most echinoderms -- a group of some 7,000 species that includes brittle stars and similarly brainless ...

The only other specimen that has come close to providing an example of ancient reproduction in brittle stars was described in ...

"It’s not an uncommon species in the UK ... "You can also find brittle stars, which are close relatives of starfish and live up to their name – they have very long, thin, and brittle arms ...

Scientists from Scripps Institution of Oceanography descended thousands of meters where they likely discovered dozens of new animal species. Creatures flourish where methane gas seeps into the ocean ...