16-08-08 Its summertime, and the fields of Yolo County are filled with ranks of sunflowers, dutifully watching the rising sun. At the nearby University of California, Davis, plant biologists have now discovered how sunflowers use their internal circadian clo...

10-04-03 New information about early Native Americans' horticultural（园艺的） practices comes not from hieroglyphs（象形文字，图画文字） or other artifacts（史前古器物，人工产品） , but from a suite of four gene duplicates（副本，复制品） found in wild and...