Quote of the day
How full of trifles everything is! It is only one's thoughts that fill a room with something more than furniture.
Joan Birman

Born: May 30, 1927 (age 98)
Bio: Joan Sylvia Lyttle Birman is an American mathematician, specializing in braid theory and knot theory. Her book Braids, Links, and Mapping Class Groups has become a standard introduction, with many of today's researchers having learned the subject through it.