Rare Bristle Worm Fossil Hints How Modern Earthworms Developed Their Heads Among the 20,000 fossils uncovered at Burgess Shale, one was found to contain soft tissue belonging to a 2-centimeter worm. It gave scientists strong evidence that in their early evolutionary stages, worms had a far different appearance. by Charmagne Nojas
Science Substances That Allow Earthworms To Transform Our World Discovered With Molecular Microscopes by Andrea Alfano