They do call our good old Canadian Robertson a "square recess".
for more trivia, did you know that the screwdriver (created in Europe)
is the only major mechanical device not independently invented by the
Chinese? (from One Good Turn: A Natural History of the Screwdriver and the Screw, Witold Rybczynski, Harper Flamingo Canada, Toronto, 2000)
Yet another oddity found on the web. An article at dailypress.com talks about a new "plasma pencil" that kills germs and could be used to remove dental bacteria!
From the article:
The pencil generates a "cold plasma," which can be used to kill germs that contaminate surfaces, infect wounds and rot your teeth.When he turns the pencil on, it blows a high pitched whistle as a glowing, blue-violet beam about 2 inches long instantly appears at one end. Stick your finger in its path and you only feel a cool breeze, but the beam is powerful enough to blast apart bacteria that's crawling on your skin.
Now all I have is a mental image of someone brushing their teeth with a lightsaber...oh, gee...look what I found on google...