The Pompeii worm lives on the chimney of a deep-sea hydrothermal vent. Its tail endures eighty degrees Celsius. Its head, a few centimetres away, stays at twenty-two โ a sixty-degree difference across a space shorter than your finger. No other animal on Earth is known to survive a split like that. Three things make it possible: a living bacterial coat, heat-shock proteins, and insulating bristles. Alone, none would be enough.








