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For many of us, coffee is our best friend. Its there in our times of need, whether a cold weekday morning or during an all-nighter. Coffee is warm, reassuring and keeps up sharp. But do we really know what coffee is doing to our brains?

Fortunately science can tell us! Did you know that scientists are the biggest coffee drinkers of all? So scientists are bound to know more than a thing or two about the magical effects of coffee.

Read More: 14 Surprising Facts About Caffeine, Explained by Science