00:00What lies beneath the ice of Antarctica has shocked scientists around the world.
00:04Hidden beneath its frozen waters are not just a few,
00:07but 332 massive underwater trenches, called submarine canyons,
00:13carved deep into the ocean floor.
00:15That's five times more than anyone thought.
00:17Some of these reach down over 13,000 feet, deeper than Mont Blanc is tall.
00:22But what's more shocking is how they were formed.
00:25Picture an avalanche, underwater.
00:26These are called turbidity currents, rushing walls of mud, sediment, and water
00:32that race downhill at 45 miles per hour, carving giant scars into the seafloor.
00:38And Antarctica's canyons?
00:39They're the largest and most impressive on the planet.
00:42East Antarctica holds vast U-shaped channels carved over millions of years.
00:47West Antarctica?
00:48Sharper V-shaped canyons, shaped by more recent ice melt.
00:52And these canyons do more than sit quietly under the sea.
00:54They help move cold water from the ice deep into the ocean, keeping our climate balanced.
01:00At the same time, they carry warm water back toward the ice,
01:04accelerating the melt and pushing sea levels higher.
01:07The twist?
01:08These canyon effects are missing from major climate models.
01:11Which means, we may be underestimating the future of climate change.
01:15This could be a peep.
01:28This could be a 넣er for selecting a load of teşekkür.
01:31That doesn't seem to be a advocating for clear of the snowflake pot.
01:32I Peggy, let the pciones are bir cheer.
01:33It's much easier for them to be a Birнуть- Grizz.
01:36And well, if it's aggressive, it's a lucky thing of a lot of three years to be weakened
01:38that these are the elements of a thoroughly structured fashion,
01:39hard to make a correction that for a while.
01:40That means to be a algunos shaped pitch.
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