'Death March' of a 550 Million-Year-Old Worm Discovered

The ancient worm fossils were discovered in southern China, one of them featuring a 'mortichnia,' or trail it produced immediately before dying. The worm is the subject of a study published in the journal Nature by a team of international scientists.
Published: 1:57 PM EDT September 4, 2019
Updated: 1:35 PM EDT September 4, 2019