宇宙探秘:宇宙大爆炸(12)
At the dawn of time, the universe explodes into existence from absolutely nothing into everything. But everything is actually a single point, infinitely small, unimaginably hot, a super-dense speck of pure energy. __________ The entire observable universe was a millionth of a billionth of a centimeter across at that time. Everything was compressed into an incredibly hot, dense region.
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