Permian (about 299 million to 252 million years ago)
Ma Shi Chau, Hong Kong
Collection of Antiquities and Monuments Office, Development Bureau

Besides being the bodily remains of prehistoric life, fossils can be the traces of their existence. A worm is believed to be “solely responsible” for this animated trace fossil. Notably, no Triassic (after the Permian, about 252 million to 201 million years ago) geological formations have been discovered in Hong Kong. The period during which dinosaurs first appeared remains a mystery.

Where is the fossil?