How is it that a 4yo kid and an 8yo kid look and behave so differently while a 21yo person might as well look and behave the same as someone who is 5-6 years older?
In: Biology
Its like when you have one piano in a room and add a second one. It will be much louder an you will cleary hear the difference. Whereas when they are 100 pianos in one room. The noice that was added is the same. But you will not recognize the difference.
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