00:00What if Earth's oceans didn't arrive from space, but were hiding inside the planet all along?
00:05Four and a half billion years ago, Earth wasn't blue and peaceful.
00:09It was a blazing ball of molten rock, so hot water couldn't survive on the surface.
00:14Yet today, oceans cover 70% of our planet.
00:18So how did water not vanish in that fiery chaos?
00:21Scientists now believe the answer was buried deep underground.
00:25A new study reveals that Earth's most common mantle mineral, Bridgmanite,
00:29acted like a microscopic sponge during Earth's violent beginnings.
00:33As the planet cooled from a magma ocean, Bridgmanite trapped water deep in the mantle, far below the surface.
00:39Researchers recreated the extreme heat and pressure of early Earth using a diamond anvil and lasers reaching 4100 degrees C.
00:47The results were shocking. Bridgmanite can store far more water at high temperatures than we ever imagined.
00:52This hidden water acted like Earth's life support system.
00:56It helped drive tectonic activity, formed the atmosphere, and eventually flowed back to the surface, creating our oceans.
01:03So, Earth didn't just hold onto its water. It sealed it away in its heart, until the planet was ready for life.
01:09The way it is.
01:10The way it was done is lit, the way it is.
01:12That way it is.
01:13It settled.
01:14And I think it's like a tree and a tree, it's like a tree.
01:17We didn't see it.
01:18We didn't see it anymore like that.
01:19But the sun was like the sun was in the sea, even though.
01:20We didn't see it all blue, you know.
01:21We may see it.
01:22We didn't see it.
01:23We're done.
01:24So we are the next couple of the waters.
01:25You know, I felt like the sun is ready for life.
01:27We saw the sun was ready for life.
01:28We can never see it.
01:29We can never see it.
01:30We've been justихjis and we have something interesting.
01:31We have to have the power of this.
01:33We can't do anything more.
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