In early November in 2023, a diver, swimming off the coast of Sardinia,     1     (notice) pieces of metal on the ocean floor. He called the authorities and more divers were sent to look. The pieces turned out to be ancient Roman coins. The coins mostly lay     2     (bury) in sand and seagrass not far from the coast. It is said that more than 30, 000 coins have been found,     3     are close to 2, 000 years old. Experts call this a major historical discovery.