What's Pi Day all about? Math, science, pies and more

Math enthusiasts around the world, from college kids to rocket scientists, celebrate Pi Day on Thursday, which is March 14 or 3/14—the first three digits of an infinite number with many practical uses.

Stephen Hawking's archive, office acquired for UK public

London's Science Museum and the Cambridge University library said Wednesday they have acquired a large collection of items belonging to late physicist Stephen Hawking, from his personalized wheelchairs to landmark papers ...

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