THE WEEK'S MOST POPULAR SONGS RANKED BY RHYTHMIC RADIO AIRPLAY DETECTIONS, AS MESURED BY MEDIABASE AND PROVIDED BY LUMINATE. STATIONS ARE ELECTRONICALLY MONITORED 24 HOURS A DAY, 7 DAYS A WEEK ...

Circadian rhythms are the regular, daily cycles of biological processes or activities, including the regular and predictable variation in the levels of many circulating hormones, ions and the ...

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