Some animals grow thicker fur, or live in tree holes or underground to stay warm.
有些动物会长出浓密的毛发，或者居住在树洞或地下来保暖。
In nature, we can see asymmetry in tree branches, in clouds, and in the fur of animals.
自然界中，树木的枝杈，云朵，和动物的皮毛都是不对称的体现。
Cats that hunt on open, rocky ground by daylight tend to have evolved plain-coloured coats, while those that pounce from rainforest tree branches typically sport dappled fur.
白天在开阔怪石磷峋的野外捕猎的猫科动物逐渐就会进化出素色的皮毛出来，而这样颜色的皮毛在雨林的树从中吸收来了黑粉变异成有斑点的皮毛。
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