Scientists just found a 500-million-year-old worm with legs

A standing ovation Jean-Bernard Caron—Royal Ontario Museum Ovatiovermis cribratus Fossil specimen of newly identified worm with legs. The rocky imprint looks like the shadow of a flattened shrimp. But this tiny creature—no bigger than a thumb—lurked in the shallow seas of North America long before shrimp existed. The 500-million-year-old worm with leg-like appendages is a distant…