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Let There Be Light When the Time Is Right: Light’s Circadian Impact

Calo Huang Circadian Rhythm

At any second, half of our planet is bathed in sunlight and the other half is soaked in darkness. And as Earth rotates, days and nights alternate, and this light-dark cycle has shaped Earth’s life for at least 3.7 billion years. Various organisms have evolved a system, a ‘biological clock,’ to predict the time of day and optimize their behaviors accordingly.       In …