Despite their name, horseshoe crabs—bizarre, ancient aquatic critters—don’t look like horseshoes and they’re definitely not crabs. They’re arachnids. Just like spiders, scorpions, amblypygids, mites ...

Pharmeceutical companies could soon have easier access to synthetic alternatives to horseshoe crab blood, a key ingredient used to test vaccines and medical devices for contamination. The U.S.

During the full and new moons in the months of May and June, thousands of horseshoe crabs line Delaware Bay beaches to spawn along the shoreline. Horseshoe crabs date back 445 million years and ...