Trilobites are cool. They are distant relatives of the horseshoe crabs. They went extinct 262 million years ago, but they lived for 300 million years before that, twice as long as the dinosaurs. Here is an article about the current state of trilobite science on their evolution, ecology, and sex lives. It includes a song about trilobites by a trilobite researcher that is amusing and will not win a Grammy or become a Top 10 hit. http://nyti.ms/1eY563Q
