Size matters in wildlife, for species and individuals. As relative skin surface versus mass decreases exponentially with size, large animals have an advantage in the cold, hence Arctic species tend to be larger, like the polar bear, but a disadvantage in war weather, requiring adaptations in the tropics and deserts to cool down, gather or conserve water. Larger also means stron...$北极熊摩擦雪地降温的样子也太可爱了，流口水的巨蜥有点吓人，看上去冻死的沙螽真是奇妙……真是太喜欢各种纪录片啦！$唉，珊瑚群都得“白化病”了……
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