Science360
Biological Clocks - Science Nation
Everything from the mysterious phenomenon of "early morning" heart attacks in humans -- to how tiny nocturnal mammals evade predators -- to the blooming of plants -- is regulated by an organism's internal "biological clock." With support...
Getty Images
Kansas Sunflowers Setting The Mood HD
The Kansas State Flower is the Sunflower. Beautiful transition video. HD 1080
Curated OER
Endocrine System and Hormones
Paul Andersen compares your endocrine system to Facebook and your nervous system to Gmail in order to show the differences in response time. He then delves into specifics of your endocrine system, talking about hormones that are water...
National Science Foundation
National Science Foundation: Mysteries of the Brain: Brain States and Consciousness
A neurobiologist and a mathematician are studying the fruit fly to learn more about how cells communicate during sleep. [4:45]
Science Friday Initiative
Science Friday: Vegetables Respond to a Daily Clock, Even After Harvest
Researchers have found that cabbages can maintain a circadian rhythm, even in the store.