Cosmologists Debate How Fast the Universe Is Expanding In 1998, cosmologists observed dozens of distant supernovas and inferred that they’re racing away from Earth faster and faster all the time.
What Is the Geometry of the Universe? Today, we know the Earth is shaped like a sphere. But most of us give little thought to the shape of the universe.
Richard Feynman on Teaching Math to Kids and the Lessons of Knowledge Richard Feynman knew the difference between knowing the name of something and knowing something. He had a beautiful talent to teach math.
Meet the New Math, Unlike the Old Math The latest effort to overhaul math and science education offers a fundamental rethinking of the basic structure of knowledge.