So why is it so expensive and who's buying horseshoe crab blood? The blue color comes from copper in the blood. But that's not its most interesting feature. The blood contains a special clotting ...

What is a Japanese spider crab? They may look like something from a 1950s sci-fi film, but Japanese spider crabs are gentle giants. And giants they are. Of the 60,000 species of crustaceans on ...