The original version of this story appeared in Quanta Magazine. Imagine a town with two widget merchants. Customers prefer cheaper widgets, so the merchants must compete to set the lowest price.
CHICAGO (WLS) -- Chicago police released new information about a person that they believe is connected to a deadly shooting in the Loop last weekend. Armani Floyd was shot and killed on Friday night ...
Will you have a white Christmas this year? What do you notice about the map below? What questions does it raise for you? By The Learning Network What do you notice about the global nuclear stockpile, ...
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