t = 100 years
100年后
After 100 years, we 8217;d be experiencing over 6 gees of gravity. Not only would we be unable to move around to find food, but our hearts would be unable to pump blood to our brains. Only small insects (and sea animals) would be physically able to move around. Perhaps humans could survive in specially built controlled-pressure domes, moving around by keeping most of our bodies submerged in water.
100年后，我们将感受到6倍重力。我们不仅没法四处走动寻找食物，就连心脏都无力把血液泵到大脑中去。只有一些小昆虫（和海洋生物）还有可能四处活动。也许人类可以在专门设计的控压屋里生存，要移动的话也要先把大部分身体浸在水里。
Breathing in this situation would be difficult. It 8217;s hard to suck in air against the weight of the water, which is why snorkels can only work when your lungs are near the surface.
在这种条件下呼吸是十分困难的。由于水的压迫，你很难吸入空气，这也是为什么呼吸管只在浅水里才有用。
Outside of low-pressure domes, the air would become unbreathable for a different reason. At somewhere around 6 atmospheres, even ordinary air becomes toxic. Even if we 8217;d managed to survive all the other problems, by 100 years, we 8217;d be dead from oxygen toxicity. Toxicity aside, breathing dense air is difficult simply because it 8217;s heavy.
出了控压屋，你还是无法呼吸空气，不过原因和之前的不一样。在约6倍大气压下，即使是普通的空气也变得有毒起来。即使我们能够克服其他所有困难，100年后我们还是会死于空气中毒。除去毒性不说，呼吸致密的空气也非常困难，因为它太重了。
Black hole?
黑洞？
When would the Earth eventually become a black hole?
什么时候地球会最终变成一个黑洞？
It 8217;s hard to answer that, because the premise of the question is that the radius is steadily expanding while the density stays the same-whereas in a black hole, the density increases.
这个问题很难回答，因为问题中说虽然半径一直在变大，但密度一直不变——而在黑洞中，密度会增加。
The dynamics of really huge rocky planets aren 8217;t often analyzed, since there 8217;s no obvious way that they could form; anything that large will have enough gravity to gather hydrogen and helium during planet formation and become a gas giant.
很少有人会去研究那些超大型的岩石行星的动力学，因为它们很难形成：任何这么大的东西在形成过程中都足以吸引大量的氢和氦，从而变成一颗气态巨行星。
At some point, our growing Earth would reach the point where adding more mass causes it to contract, rather than expand. After this point, it would collapse into something like a sputtering white dwarf or neutron star, and then-if its mass kept increasing-eventually become a black hole.
在未来的某一刻，不停扩张的地球总有一天会变成这样的状况：每增加一点质量，它都会缩小而不是变大。自那以后，它会不断坍缩，直到变成一颗白矮星或者中子星——如果质量还是不停增加，它最终会变成一个黑洞。
But before it gets that far . . .
但那要等好久……