00:00You won't believe what this animal can survive.
00:03Polar bears can hold their breath underwater for over two minutes
00:07while diving 40 feet deep, hunting seals beneath the ice.
00:11But here's where it gets crazy.
00:13Their bodies literally shut down nonessential functions,
00:16slowing their heart rate to conserve oxygen.
00:19They're basically built like underwater submarines.
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