00:00Scientists have just uncovered 332 hidden canyons beneath Antarctica's icy surface.
00:06Some of them dive over 4,000 meters deep, and they could be reshaping our planet's climate right now.
00:12Mapped using cutting-edge sonar data and new semi-automated techniques,
00:16these submarine canyons are five times more than previously known.
00:20And they're not just geological marvels. They supercharge how ocean water moves.
00:24East Antarctica holds the biggest and most complex canyon systems.
00:29Wide, branching, and formed over millions of years by glaciers.
00:33While the Wests are sharper, shorter, and more abrupt,
00:36this split offers a glimpse into how the ice sheets evolved, and why that matters today.
00:41These canyons act like underwater highways, pulling warm water in and cold water out.
00:47This flow helps melt ice shelves from below, the same shelves that hold inland glaciers in place.
00:52When they melt, sea levels rise faster.
00:54Here's the catch.
00:56Our climate models still don't fully account for how these canyons stir the deep ocean.
01:01Which means our projections of sea level rise may be underestimating the risk.
01:06And with only 27% of the seafloor fully mapped,
01:09who knows what else lies beneath the ice?
01:11So, when they don't do the ocean, what else do they do?
01:20They put a fewopinguki, levantいる to their own.
01:23Like I said, we're amazing.
01:25At first, they start to close this LT!
01:28Now, there are some ground in the ocean.
01:31So now there are some foundations that through اive us in this time.
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