Imagine a creature that predates the dinosaurs by hundreds of millions of years, yet plays a critical role in safeguarding human health today. Meet the horseshoe crab — a "living fossil" whose blood has quietly underpinned modern medicine for the past 50 years. An Ancient Body With an Unusual Blood Type These helmet-shaped arthropods, with their spiky tails and five pairs … [Read more...] about Ancient Protectors: The Vulnerable Horseshoe Crab and its Vital Role in Modern Medicine