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Phenology: Timing Is Everything (Encore)

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You may not be able to dance, but you do have rhythm. All humans have rhythm. It is the circadian clock, a 24-hour cycle that regulates our sleep-wake timing and other physiological processes.

It is our response to our relationship with a star: The sun. All of nature has a rhythm, too.

As chief executive officer, John Racanelli leads a team of 600 full and part-time employees and 1,000 volunteers in pursuing the National Aquarium’s mission to inspire conservation of the world’s aquatic treasures. More than 1.5 million people annually visit the Aquarium’s venue in Baltimore, Maryland, while millions more are touched by the Aquarium’s education programs, outreach activities, social media campaigns and conservation initiatives.