‘Heresy’ Law Adds Horseshoe Crabs to Arachnid Family Tree

Horseshoe crabs are small armored vehicles. bright blue blood. They’ve been rolling on the ocean floor for hundreds of millions of years. Other powerful creatures have come and gone in all this time: dinosaurs, mammoths, terror birds, Neanderthals. The humble horseshoe crab lived on nowadays, looking not much different from its ancestors in the Mesozoic […]