The oldest known animal in history has been discovered thanks to some well-preserved animal fat that’s been sitting in northwest Russia for the past 558 million years. The find expands the confirmed existence of animals by three million years.

The ancient animal is a Dickinsonia, which looks more like a creature from a sci-fi movie than something you’d expect to run into on Earth. Dickinsonia were oval-shaped creatures spread flat like pancakes that could grow up to four and a half feet long. Previously, the oldest macroscopic animal in the geological record was the mollusc-like Kimberella from 555 million years ago.