Science News: Keeping time

Scientists are discovering how tiny clocks inside each cell can march to the beat of a master drummer in the brain… “We know that the clock is there [in the brain]. We’ve known about different firing rates. We’ve learned a lot about the genes that control clock activity, but none of that tells us how the clock actually controls anything,” says Charles Bourque, a neuroscientist at McGill University in Montreal. To help tackle that question, Bourque’s team has deciphered some of the chemical messages the SCN uses to regulate a circadian rhythm that keeps the body from dehydrating during sleep.

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