一万年内就是整个已知的宇宙。
亲爱的科学一刻，我知道人脑非常不可思议，是已知的宇宙世界中最复杂的构造。
Dear a Moment of Science, I know the human brain is an incredible thing, the most complex object in the known universe.
哪个是宇宙中已知的最大黑洞？它是怎样形成的？
What's the largest black hole known in the Universe and how did it form?
黑洞是宇宙的已知部分，和现有科学尚未触及的地方的边界。
The boundry between the known universe and the place beyond the reach of science.
黑洞是宇宙的已知部分，和现有科学尚未触及的地方的边界。
The boundry between the known universe and the place beyond the reach of science.
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