
Circadian rhythms in art
The activities of most plants and animals are timed to the cycle of day and night. These natural rhythms are called circadian rhythms. The most obvious example is the sleep cycle. As well, many plants and animals are sensitive to other time cycles. “Phototropic” sunflowers, for example, turn their faces to follow the sun’s path. Others make their moves in guaranteed light. Some sea animals time their activities to changing tides. These creatures seem to know such times even when away from their home waters. Yep, if you put clams into your kitchen sink, they will try to feed when the tide is rising down there in the bay.