I see lots of answers, and all quite nice and make sense but let’s approach this differently, for fun. Most folks thinks in “addition land” fairly easily.  Let’s look at that first.When I write

This article was originally published at The Conversation. The publication contributed the article to Live Science's Expert Voices: Op-Ed & Insights. As "Star Wars: The Last Jedi" opens

The school bell goes off to signal the start of the twenty-minute recess period. All the pupils get up from their seats, and with the permission of the teacher make their way to the school canteen. The

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