The stick insect is whitish green when it is resting on the whitish green stems, but it become green when rests on the green stem. Like magic, the insect can trick our eyes.
What will happen if humans also can change colours in accordance to the environment, for example, if we can turn white when we are in Britain, turn black when we are in Africa or turn brown when we are in China, less racial discrimination will occur in this world!
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