Old school vernier calipers served engineers and machinists well for a long time — and did a perfectly good job. Digital models then came along and were easier to read. They now rule the roost, ...

In a recent episode of MacGyver, Angus (yes, that's his first name) finds his location in the desert using only a string, a protractor, and a watch. Is this actually possible? Basically, yes. (At ...