links for 2006-09-04

Poincaré conjecture, a century-old conundrum about the characteristics of three-dimensional spheres, which, because it has important implications for mathematics and cosmology and because it has eluded all attempts at solution, is regarded by mathematici

Chris Ashley has been posting scans of old children’s book covers

Working under the alias fauxreel, which is also the name of his “photo-based creative studio,” the man responsible for these and seven other billboard manipulations over the past year is Dan Bergeron

Asset tracking software for visual artists.

Spectacular remnants of a dead-end technology, the three “listening ears” at Denge near Dungeness in Kent are the best known of the various acoustic mirrors built along Britain’s coast.

A unique mix of internally developed software, open source, made-to-order hardware, and people management is the secret behind the search engine.

She knits dead people.