Ancient Wrinkled Sack: Early Ancestor or Baby Penis Worm?

The article explores the evolving scientific interpretations of Saccorhytus, a 535-million-year-old fossil initially thought to be the earliest known deuterostome and thus a potential ancestor of humans. Recent studies, however, suggest it may belong to the protostome group, possibly as a larval stage of a penis worm. The debate highlights the complexities and uncertainties in paleontological research, with no definitive conclusion yet on Saccorhytus's true identity.