Swans on Tea

Mechanical squirrels, robot lizards jump into research
In Indiana, for instance, a fake lizard shows off its machismo as researchers assess which actions intimidate and which attract real lizards. Pheromone-soaked cockroach counterfeits in Brussels, meanwhile, exert peer pressure on real roaches to move out of protective darkness. In California, a tiny video camera inside a [...]

Long but interesting NSA article: Solving the Enigma, including the American contribution of solving the Navy four-rotor Enigma codes.
(And recall a previous post about making a paper Enigma machine)