This sun-tracking behavior , known as heliotropism , is most evident in young sunflower buds and usually diminishes as the flower matures, with mature sunflowers generally facing east ...
Other sunflowers were placed in pots facing east, so at the next sunrise they were facing away from the sun. Others were exposed to intense blue light, altering the day/night cycles, switching ...
With their cheery golden hue, majestic heads and ability to follow the sun as it arcs across the sky, sunflowers have become synonymous with summertime, living metaphors of faith, divinity and hope ...