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Jet Lagging Behind

By Dr Michael McCoy

Still tired weeks after a big trip? It's not work that's boring you to sleep, it's your body clock struggling to adjust.

It seems we've all been burdened with a major design flaw. The decision to divide our solar/lunar day into 24 equal units is a system that has served us pretty well. So why are our bodies governed by a naturally repeating cycle based on a 25-hour clock?

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