Your Many Inner Clocks
You have probably heard about our inner clocks called the circadian rhythms — "You mean those bugs in North America that go zzzzzzzzzzzz up in the trees, Cowboy Bob?" Uh, you may be thinking of periodical cicadas that appear at 13 or 17 year intervals, or the regular ones that are found in many parts of the world. I hear them in August for the most part. And I see you've distracted me again. Credit: Pixabay / Wilfried Pohnke We have the circadian rhythms inside us, sometimes waking us up before the alarm goes off. They get disrupted by jet lag and Daylight Savings Time, and some people compensate by taking an over-the-counter melatonin hormone supplement. We've heard about that inner clock. It's not found only in humans, and circadian rhythms are important for many life forms. See " We All Have Rhythm " for information about that. I was surprised to learn that we have evolution-defying tiny timekeepers within us. These include communication