Creature from Outer Space?

One of the most bizarre-looking fossils ever found — a worm-like creature with legs, spikes and a head difficult to distinguish from its tail — has found its place in the evolutionary Tree of Life, definitively linking it with a group of modern animals for the first time.




Early interpretations of Hallucigenia, which was first identified in the 1970s, placed it both backwards and upside-down. The spines along the creature’s back were originally thought to be legs, its legs were thought to be tentacles along its back, and its head was mistaken for its tail.