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Have you ever held your hands in water for a long time and then noticed your fingers wrinkling? At first, you might think it is simply because “my skin absorbed water.” But in fact, the wrinkling of our hands is a very special feature of our body! Thanks to this feature, it becomes easier to grasp wet objects. In a way, our hands behave like tiny sponges. Can Our Hands Behave Like Sponges? Think of a sponge: when you put it in water, it draws water inside and can be squeezed. Our hands are not e