Andrei Nikolaevich Kolmogorov
was born 105 years ago
25th April 1903

Kolmogorov was one of the developers of probability theory. He later used this work to study the motion of the planets and the turbulent flow of air from a jet engine.

Find out more at:
http://www-history.mcs.st-andrews.ac.uk/Mathematicians/Kolmogorov.html