00:00How deep could you survive underwater?
00:02Let's say you grab a tank full of regular air and you start diving down.
00:05You quickly pass the depth a typical open water scuba diver can go,
00:09but you go further and further.
00:11And as you go deeper, the pressure is causing the nitrogen in your air to become narcotic,
00:16and the oxygen is becoming toxic.
00:17So to go deeper, divers breathe a mixture that replaces some of both with helium,
00:22which doesn't react with our bodies but makes it easier to breathe.
00:25Shockingly, the deepest free diver has reached 214 meters on a single breath.
00:32But you pass them and you keep going,
00:33and you're now at the deepest anyone has ever gone with scuba gear.
00:37Extreme divers can get down here in only 15 minutes,
00:40but returning can take over 13 hours because you need to make sure that the remaining nitrogen
00:46in your blood doesn't bubble inside you as you ascend.
00:50We're land animals. It's amazing that we can do this.
00:53We have really cool videos coming about the deep ocean, so subscribe.
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