Interesting Link:

Pi or 2Pi: That Is the Question

In February this year there appeared in Physics World an article entitled Constant Failure by Robert P Crease of Stony Brook University, in which he showed in how many formulae of physics and mathematics 2π turns up, rather than π. This article struck a chord with me, since even after many years I remember the feeling of "cognitive dissonance" when being taught that the formula was 2πR rather than πD.

Do not forget to read the comments.

Palmistry Anyone?

Here is an interesting piece of research which throws some light on relative lengths of Index and Ring fingers and its implications.
Finger Length Predicts Aggression in Men

The research, done at the University of Alberta and announced Wednesday, found a connection between the length of the male index finger relative to the ring finger and the tendency to be aggressive. No such connection was found in women. Scientists have known for more than a century that the finger-length ratio differs between men and women. Recently, scientists found a connection between finger lengths and the amount of testosterone that a fetus was exposed to in the womb: the shorter the index finger relative to the ring finger, the higher the amount of prenatal testosterone.The new study found such a fetus is more likely to be a physically aggressive adult, according to Peter Hurd and his graduate student Allison Bailey.

Interestingly, I found that the traditional sciences of palmistry have exactly opposite to say. Read a piece here, which says it is a long index finger which makes you dictating and authoritative.

More about scientific explanations about relative lengths of Index and Ring fingers, here.