Worm-like fossil This tiny fossil, measuring just a few centimeters, is significant as it is the oldest confirmed ecdysozoan and the only one known from the Precambrian era.

In a recent study published in Current Biology, researchers introduced Uncus dzaugisi, a 555-million-year-old, worm-like organism found in the ancient rocks of Nilpena Ediacara National Park (NENP).