Image copyright
SOHAIL WASIF/UCR
Artist’s making of Ikaria wariootia. It would have lived on the seafloor.
The organism, about the size of a grain of rice, is described as the earliest example yet discovered in the fossil record of a bilaterian.
A plethora of animals, from worms to pests to dinosaurs to human beings, are arranged around this same basic bilaterian body plan.
Scott Evans, of the University of California at Ri