This is an automated archive made by the Lemmit Bot.

The original was posted on /r/todayilearned by /u/Sebastianlim on 2025-06-12 09:01:07+00:00.

Original Title: TIL about John Day, who attempted to dive to 130 feet in a wooden diving chamber in 1774. After a few hours, he had not resurfaced and was eventually declared dead. Day is the first recorded death in a submarine.