Screen Shot 2015-11-04 at 2.26.10 PM.png

The original 520-million-year-old Fuxianhuia protensa specimen from the Chenjiang fossil beds in southwest China reveals the ancient arthropod was just shy of five inches. (Photo courtesy of Xiaoya Ma, London Museum of Natural History) The original 520-million-year-old Fuxianhuia protensa specimen from the Chenjiang fossil beds in southwest China reveals the ancient arthropod was just shy of five inches.