It’s time for an alien-looking Trilobite Tuesday! 

By the Ordovician time period, approximately 460 million years ago, trilobite eyes had developed into an almost dizzying array of sizes and shapes. Some, like those attached to species such as Asaphus kowalewski (pictured) and Cybele panderi, sat atop spindly “stalks” up to three inches long. This feature presumably allowed the trilobite a better view of the world around it, even when it may have been lurking under a thick layer of silt or mud along the sea bottom. Other trilobites of the time period, such as the aptly named Cyclopyge bohemica, developed huge wrap-around holochroal eyes featuring over a thousand small, tightly packed lenses that allowed a virtually uninterrupted view of the ocean surrounding it.

Meet many more trilobites on the Museum’s website.