Is the world’s oldest protractor sitting in a museum in Turin?
Physicist Amelia Sparavigna thinks she has solved the mystery of a wooden box that was found over 100 years ago in the tomb of an architect from ancient Egypt, but is her theory correct?
New Scientist has a nice article with a photo of the box and some diagrams showing how it could have worked. Why not head over there and take a look for yourself?
Photo: 128 Angle Protractors by macattck on Flickr. Used under Creative Commons Licence.