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Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. Pi Day (March 14) is a day of global mathematical celebration, but ...

Once a century, a very special day comes along. That day is today — 9/16/25. Pi Day (3/14) often comes with sweet treats; Square Root Day (4/4/16 or 5/5/25, for example) has a certain numerical rhyme.

Large scale destruction of trees—deforestation—affects ecosystems, climate, and even increases risk for zoonotic diseases spreading to humans. A logger takes down a large tree at the Tuxekan logging ...