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What ‘Sell By’ and ‘Use By’ Dates on Food Really Mean

At least 90 percent of Americans throw out food each year because they don't understand the meaning of dates stamped on packages. Here is how to stay safe.

Why we used to sleep in two segments – and how the modern shift changed our sense of time

Historical records from Europe, Africa, Asia and beyond describe how, after nightfall, families would go to bed early, then ...