TRILOBITE EYES: THE ORIGINAL STONE-COLD STARE

The ancient oceans were full of watchful eyes. Some bulged. Some perched on stalks. And some belonged to animals that looked at the world through crystal lenses.Meet the trilobites.Armoured, joint-legged and occasionally extravagantly spiny, these marine arthropods had a remarkable approach to eyewear. Many built their eye lenses from calcite.Yes, a mineral.Long before anyone peered through a

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