Tom Wujec explains the astrolabe

The modern meets the medieval when software designer Tom Wujec explains the astrolabe. The video is available to view on the blog Ted Talks. (video)

According to the website, "Wujec studies how we share and absorb information." In this case, he describes how the astrolabe was used to collect information, with the help of a beautiful replica of a period device borrowed from the Oxford Museum of History.