Even if you’re not playing Pokémon GO yet, chances are you've heard of it. The new mobile game for iOS and Android launched on July 6 in the U.S. and July 17 in Canada. Developed...

Isaac Newton’s fundamental work on motion and gravity may have been challenged by Einstein’s theories in the early 20th century; but the ideas and mathematical foundations laid out in Philosophiae Naturalis Principia Mathematica,more commonly...