fun fact: Linus Torvalds, in addition to being the author of the linux kernel and the git VCS, is also the original author of subsurface, a software for downloading and managing dive logs from scuba diving off your dive computer

on a less lighthearted note, if you're interested in coral reefs, i highly recommend the beautiful and heartbreaking film "chasing coral". it follows a group of divers who set out to film a coral bleaching event in real time by designing an underwater timelapse camera. it's a wonderful intersection of technical engineering challenges and ecology that i think would appeal to a lot of HN readers

movie: https://www.chasingcoral.com/ subsurface repo: https://github.com/subsurface/subsurface