00:00Did you know giant cargo ships are accidentally building secret underwater superhighways?
00:05These massive steel propellers churn the ocean into low pressure vortex tunnels.
00:10It's called hydrodynamic drafting, and apex predators have learned to hitchhike across
00:16the globe using them.
00:17Sharks and whales are literally tucking into the wake behind these ships, saving up to
00:2240% of their energy.
00:23They're traveling thousands of miles while barely breaking a sweat, following the noise
00:28of the engines like a dinner bell.
