How Will The World End?

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It's a question that's preoccupied scientists, movie directors, and doomsday cults alike. As it turns out, we have some pretty good guesses as to what will destroy our planet-and, in time, even the universe. Sift through some apocalyptic scenarios and try not to panic.

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Key Facts In This Video

  1. Breaking apart Earth would take as much solar energy as the Earth receives over 40 million years. 00:30

  2. To destroy Earth, the largest known asteroid would have to hit the planet at 700 km/s. 02:06

  3. In 100 billion to a few trillion years from now, the expansion of the universe might affect smaller-scale objects, such as planets. 05:43

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