Earth Science Week on Instagram: "Evolution’s perfect child, the Horseshoe Crab, is neither 🧲 nor crab 🦀…it’s technically part a subphylum called “Chelicerata”, meaning it’s more closely related to spiders, ticks, and scorpions than to crabs. While those guys can all be scary, this guy is tougher than them all! 💪 The perfect evolutionary example of “if it ain’t broke, don’t fix it!”, these chelicerate arthropods have been scuttling the seafloor since before our ancestors had jaws! 🧲🦀 Meanin