translation.en: Almost everyone who hasn't heard this before is surprised when they hear that if you take a 0.1 millimeter thick sheet of paper, the size we normally use, and, if it were big enough, fold it 50 times, its thickness would extend almost the distance from the Earth to the sun.
translation.zh: 下面这个事实，当第一次听到时， 几乎所有人都会觉得不可思议： 如果你拿一张0.1毫米厚的纸张， 平常用的纸就这么厚， 如果它足够大，对折50次， 纸的厚度几乎相当于地球到太阳的距离。