Scientists find 240 million-year-old parasite that infected mammals’ ancestor

It’s very small and incredibly old – scientists have found the egg of a 240 million year old parasite – a pinworm, to be more precise. It’s the oldest pinworm ever found, and one of the oldest evidences of parasitism ever found. The pinworm, also known as threadworm, is a parasitic intestinal worm, pretty common in humans. The pinworm has