Okay without trying to sound like a smartass when the most obvious answer is lack of sleep, what actually goes on in the body to physically cause the look of someone looking tired? Pale skin, dragged eyes, etc.
In: 12
You can see a person’s muscles running out of energy in their drooping faces and slouched posture. Your brain is trying to get off autopilot and you have to make a conscious effort to stay awake.
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