the.com/snorkeling
swimming with your face in the water and somehow calling it a vacation activity.
ancient gearAristotle described divers using breathing tubes in 350 BC
sponge originsearly snorkels came from hollow reeds for harvesting sponges
tube limitsnorkels stay short because long ones cause suffocation
fish blindnessfish often ignore floating humans as harmless drifting objects
breath physicsexhaled air pools in the tube, raising carbon dioxide risk