Ancient rock wiggles could be earliest trace of moving organism theguardian.com

A collection of short wiggly structures discovered in ancient rocks could be the earliest fossilised traces of organisms able to move, scientists say. If scientists are correct, the 2.1bn-year-old structures point to an earlier origin than generally thought for eukaryotes – cells with a membrane-bound nucleus and which make up plants, animals and fungi – previously believed to have first emerged about 1.8bn years ago. It also pushes back the earliest evidence of self-propelled movement of eukaryotes by 1.5bn years – scooping the title from far younger multicellular lifeforms – and would be the first clear signs of motility for any type of organism.