Diving Bells: The Barometric Physics of Deep Survival

Centuries before the invention of scuba gear or pressurized submarines, maritime empires were desperate to salvage cannons, gold, and cargo from sunken galleons. Their solution was as mathematically brilliant as it was utterly terrifying: the diving bell. Lowering an open-bottomed wooden chamber into the sea created a trapped pocket of breathable air, allowing divers to work on the ocean floor. ...