Office worker yawning with arms raised, illustrating contagious yawning and workplace fatigue.
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Woman sleeping on white bedding with warm bedside lamp, illustrating REM sleep and nighttime routine.
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Close-up of a person tipping wooden dominoes to start a satisfying chain reaction.
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Close-up of a human eye with rainbow light, illustrating color vision and tetrachromacy.
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Close-up of a young woman with eyes closed, savoring music and experiencing goosebumps.
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