You might think twice about a critter related to scorpions and spiders, but fear not. The lowly horseshoe crab is providing medical miracles. Born before the dinosaurs, back 300 million years ago in the Cambrian, the horseshoe crab has developed a remarkable immune system slowly evolved over the eons. And this immune system is teaching doctors a great deal. Hail the horsecrab! https://www.yahoo.com/news/horseshoe-crabs-may-answer-safe-140539835.html
