00:00Scientists can't explain how this animal does this.
00:03Snow geese fly 1,000 miles without stopping.
00:06Not resting.
00:08Not landing.
00:10Just pure nonstop flight across entire continents.
00:13Wait, animals can do that.
00:15Here's the crazy part.
00:17Their bodies literally transform before migration.
00:20Their muscles grow massive, their heart gets stronger,
00:23and they pack on fat reserves like they're preparing for hibernation.
00:26But here's where it gets even crazier.
00:28These geese can sleep while flying.
00:31Half their brain shuts down at a time, so they never actually lose consciousness.
00:35They're navigating thousands of miles in a state we didn't even know was possible.
00:40Nature is unreal.
00:42Follow for more.
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