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Posts published in “Concepts Explained”

What Causes the Tides?

The Truth Behind a Daily Phenomenon The tides change twice a day, but have you ever wondered why? About every twelve hours, the oceans go…

Mold Saves Lives

How did we discover penicillin, and how did it become a widespread, lifesaving medicine? When Alexander Fleming, a Scottish physician and microbiologist, returned from a…

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