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Two American Teenage Girls May Have Cracked a 2,000-Year-Old Math Puzzle With a Stunning New Pythagoras Proof

For over two millennia, mathematicians agreed on one thing: you can’t use trigonometry to prove Pythagoras’ Theorem—because ...

Mom’s 10 Rules for Toddler Go Viral—‘Banned in Our House’

Tyree Cairns explained that the rules are in place to give her daughter a sense of safety, structure and independence.