Oldest Guts Ever Found May Reveal the Identity of a Mysterious Primordial Creature

By Stephanie Pappas Tiny, tubular fossils found in Nevada may contain the oldest digestive tracts ever found. The fossils date back more than half a billion years, to the late Ediacaran period. That makes them about 30 million years older than the next-oldest fossilized guts on record. More important than their age, though, is that …