Pi may be ancient, but the worldwide obsession is still alive. This mistress of circles is the subject of various books, movies, memory contests, and tests of computing power. Read More

Root 2 is a radical that redefined and expanded what math could do and what it could be. It is probably the first known irrational number, and it is the first known root. Read More

Appearing everywhere from the Parthenon to Penrose tilings to pinecones, pansies, and pineapples, the golden ratio pervades nature, art, and architecture. Read More

The natural logarithm of 2 has the magic power of doubling. Whether you are talking about cell growth, population growth, decay, the continuous growth of money, or the effects of inflation, log_e2 makes its mark. Read More

Logarithms revolutionized astronomy, mapping, navigation, and general computation. Your ears and eyes respond logarithmically to loudness and brightness. Log base 10 is far from being common. Read More

e has mad influence in logarithms, architecture, business calculations, population growth, and much more. If you aren’t already a fan, he is sure to grow on you. Read More

This constant is active in scattered areas of math, and is a close relative of the Riemann Hypothesis. A million dollar prize is being offered to the first clever mathematician to prove this hypothesis. Read More

The Harmonic Series, a subtle giant, is a sum who lazily wanders off to infinity. When he gets suddenly attacked by the natural log, all that remains of the fierce battle is Euler's constant gamma. Read More

Originally, we thought that light was merely a wave, but Planck’s blackbody radiation experiments reveal that light also acts like a particle. Planck’s constant caused a revolution in light theory. Read More

How much energy would you need to break apart a single crystal of salt? Madelung’s constant holds the key! Read More

A modern computational probability that has broad implications about the complexity of the universe. Read More

Feigenbaum’s constant describes the order found in chaos. So there IS method to the madness! Read More