tesselation
Today is Escher's birthday
As soon as I wake up (usually at about 5 or 5:30 in the morning), I have the
habit of switching on and listening to the NPR (Natl Public Radio, people in
India and abroad may listen to this on the internet). There is a segment in
it called the Daily Almanac, hosted by the incomparable Garrison Keillor. He,
in five minutes, gives the day's significant events in the field of arts
