The horseshoe crab (Limulus polyphemus) is often described as a "living fossil," a species that has endured for over 450 million years. It outlasted the mass extinctions and dramatic shifts in Earth's ...

Digital dissection shows that two horseshoe crab appendages -- the pushing leg and the male pedipalp -- each have one more muscle than had been thought, according to a study published February 14, ...

Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. With copper-blue blood prized by modern medicine and a body ...