Three videos

ACHSM Blog has a post featuring three videos on how to do bicycle infrastructure. Well worth watching if you want to see the positive effect that well-planned paths can have on a city.

'via Blog this'

Science, Reason and Critical Thinking: The Crudity of Early Home Computing

I'm pretty sure Sir Clive didn't put anything cruder than "POKE" on the Spectrum, but if he had, I think he would have at least checked his spelling first.

Radiation

Randall Munroe, who writes and draws the excellent webcomic xkcd has created this chart showing radiation doses experienced by real people doing real things. Great way to get some perspective.