It can be quite the hassle, trying to measure curved surfaces with either a stiff metal tape measure or a floppy cloth one that won't stay in place. The Tiroler 2.0 offers a clever alternative, and it ...

John is Ars Technica’s science editor. He has a Bachelor of Arts in Biochemistry from Columbia University, and a Ph.D. in Molecular and Cell Biology from the University of California, Berkeley.