@naturalhistorymuseum: 💡Did you know? Trilobites ruled the Earth longer than the dinosaurs! It took three major mass extinctions to end trilobites’ more than 250-million year evolutionary lifespan. Join Melanie Hopkins, curator in the Division of Paleontology, to explore these arthropods through the Museum’s extensive collection of trilobite specimens. With scientists describing new species every year—in addition to the 22,000 already on the books—there’s still so much to uncover about these animals. #naturalhistory #stem #museums #fossils #paleontology