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The world today teems with life.
如今，我們的世界生機盎然。
Wherever you look, something is alive.
隨處可見活著的生靈。
Then imagine 95% of all this dying in one go.
那么請想象一下所有生命的95%在一瞬間遭到了毀滅。
It's not a fantasy.
這不是虛構(gòu)的故事。
It did happen 250 million years ago.
它確實發(fā)生過，就在2億5千萬年前。
It was the day, the earth nearly died.
那天就是地球劫難日。
