Why do the leaves change colour in the fall?

November 9 2021 | Catalina Villegas Burgos
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DELVING INTO THE MYSTERIES OF THE RUBIK’S CUBE

April 7 2021 | Catalina Villegas Burgos
If you’re like me, you probably fell under the spell of the Rubik’s cube at one time. And when you realized you couldn…
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