Chilesaurus lived at the end of the Jurassic Period, approximately 145 million years ago. Illustration: Gabriel Lio via the University of Birmingham. When it was first discovered a couple of years back, Chilesaurus diegosuarezi stunned scientists with its patchwork appearance. This 145-million-year-old creature had the legs of a Brontosaurus, the hips of a Stegosaurus, and the…