Claire Kohda

Brother sun and sister moon

A clutch of new books on our close celestial neighbours reviewed

issue 20 July 2019

At the very back of the eye is a cluster of cells called ipRGCs. They are cells that don’t depend on vision to sense light, and that keep the circadian rhythms of both sighted and non-sighted people in sync with the sun. Without them, we would not feel the pull of sleep at night; we might fall asleep in the middle of the day and we would feel perpetually jet-lagged.

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