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追加: 2026-05-06

[00:00:00]4.5 billion years ago, our solar system was a chaotic and violent place. [music] Earth was just a young lava world orbiting the sun without a companion.

[00:00:10]Then, [music] a Mars-sized planet named Theia crossed its path. Theia slammed into Earth at incredible speeds, traveling over 15 km or 9 mi per second.

[00:00:20]This catastrophic [music] impact vaporized Theia and blasted billions of tons of molten rock into [music] space.

[00:00:27]Over thousands of years, gravity pulled this massive ring of glowing debris together, >> [music] >> forging the moon we see today.

[00:00:35]Scientists know this because Apollo astronauts brought back lunar rocks, and [music] their chemical signatures perfectly match the crust of our own planet. The giant impact hypothesis proves that every time you look up at the night sky, you're looking at a broken piece of ancient [music] Earth.