Anticipating Halloween, the American Chemical Society has published a study about using the shadows cast by (kinda sorta) spider legs, for scientific purposes. The paper is: “Elegant Shadow Making Tiny Force Visible for Water-Walking Arthropods and Updated Archimedes’ Principle,” Yelong Zheng, Hongyu Lu, Wei Yin, Dashuai Tao, Lichun Shi, and Yu Tian, Langmuir, 2016, 32 (41), pp. […]
This and that about drawing a perfect circle
There’s much to be said and done about drawing perfect circles. Alexander Overwijk says and does some of it, in this video: Stephen Ornes says lots more, in the essay “Archimedes in the Fence“, in The Last Word on Nothing”.