Exactly 100 years ago, on 14th December 1900, Max Planck published an article that would later form the base for the current theory of Quantum Mechanics. (no article on this Dave ?) I personally think that QM is the most important evolution in Physics of the 20th century (even while technically speaking, the foundations were laid in the 19th century (1900)). Anybody wants to share his thoughts on this ? Bye! Crisp ------------------ "The best thing you can become in life is yourself" -- M. Eyskens.