Flux in Earth May Solve Missing Mantle Mystery
It’s widely thought that the Earth arose from violent origins: some 4.5 billion years ago, a maelstrom of gas and dust circled in a massive disc around the sun, gathering in rocky clumps to form asteroids. These asteroids, gaining momentum, whirled around a fledgling solar system, repeatedly smashing into each other to create larger bodies of rubble — the largest of which eventually cooled to form the planets.
Countless theories, simulations and geologic observations support such a scenario. But there remains one lingering mystery: if the Earth arose from the collision of asteroids, its composition should resemble that of meteoroids, the small particles that break off from asteroids.
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