“Spidron.” was penned precisely on 1 May, 2006 12:03 AM, which happened to be a Monday. but you know what? dullneon.com's random notes has now moved to a new location.
A spidron is “a geometric figure composed entirely of triangles, where for every pair of intersecting triangles, each has a leg of the other as one of its legs, and neither has any point inside the interior of the other”. It was ‘discovered’ by Daniel Erdely and he first presented the idea to the world as recently as 1998.
this was published on 1 May in the year 2006, which was a Monday. anyway, all this is old and archived. everything has been now been moved, so head on down to the revamped almost daily random notes (unless of course you like this old stuff too much to part with it).