The earliest known animal to show evidence of an asymmetrical body lived over half a billion years ago in what is now the Australian outback, a new study reports.

An international team of researchers discovered a new specimen called Quaestio simpsonorum—a pancake-shaped creature that represents on of the earliest examples of complex life on Earth. This discovery provides more insight into how animals evolved from single-celled organisms and shows that there’s more to be discovered at this world-famous fossil bed.

In the remote outback of South Australia, paleontologists have unearthed fossils of a peculiar creature that may rewrite our understanding of early animal life. Named Quaestio simpsonorum, this ancient marine organism lived approximately 555 million years ago and is one of the earliest known animals capable of movement.