These Cambrian animals had very complex eyes and horseshoe crabs today stilluse similar ones. The amazing part of tis story is there are no ancestors to trilobites, before trilobites appeared. Who made these complex eyes? chance?-Every Darwinist's nightmare:- http://news.sciencemag.org/sciencenow/2013/03/looking-a-trilobite-in-the-eye.html?ref=hp