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Matchsticks ~ Free Puzzle Game with Matches
Games and Entertainment
App
Keep your mind active with this classic matches game! The rules are simple: you must create...
The Principia: The Authoritative Translation and Guide: Mathematical Principles of Natural Philosophy
Isaac Newton, I. Bernard Cohen, Anne Whitman and Julia Budenz
Book
In his monumental 1687 work, Philosophiae Naturalis Principia Mathematica, known familiarly as the...