We love symmetry（对称）. It's in our art and architecture. We even balance equations（方程式） on it. I love if symmetry makes sense because we're symmetrical（对称的）. Two eyes, two ears, two arms（臂）, two legs. Bodies that are built like paper dolls.

  But that outward beauty is superficial（表面的）. If you peel（剥） back the curtain, then that symmetry disappears. Your guts（内脏） are a mess. Now, unless you're from Gallifrey, you have one heart on the left side of your body, same as your stomach and spleen, but your liver（肝） is on the right. Even organs（器官） that look symmetrical（对称的） at first seem to tip one way or the other. The right lung（肺） is divided into three lobes（圆形突出部（尤指耳垂））, while the left lung only has two.

  And in your brain, two of the areas that are needed for speech and language are found only on one lobe, usually the left. Animals that are as distantly（疏远的） related as starfish（海星） show similar internal（内的） asymmetry. Now, the interesting thing isn't that our bodies are asymmetrical（ 不均匀的） in the first place, but that we all have the same asymmetry, unless you have a case of opicitus. One in 20,000 people have a genetic（遗传的） condition called cytus inversus, where the internal organs are inverted（使…转化） left to right. These people usually show no negative effects from their reversed innards, unless their name is Donnie Osmond. In 1972, the singer was checked into the hospital, nearly unconscious（无意识的） from pain on the left side of his abdomen（腹）.