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A circadian clock helps sunflowers follow the sun’s daily path across the sky. See how sunflower plants change their sun-orienting behavior as they mature in the clip above. Read more: Story Laurel Hamers Video Hagop Atamian, UC Davis Nicky Creux, UC Davis Production Helen Thompson S. Harmer et al. “Circadian regulation of sunflower heliotropism, floral … Read more