A Golomb ruler is very different from your run-of-the-mill tape measure. These strange rulers are defined in terms of constraints, and are “optimized” when they are the shortest they can be. While not ...

Smartphones are useful for a lot of things. You can even use one as a ruler in a pinch. Generally speaking, you won’t replace your trusty yard stick. A phone is simply too small for anything other ...

The pupillary distance (PD) measurement is a requirement for people who want to purchase eyeglasses. Here, find out how to measure your PD using a mirror and a ruler. Share on Pinterest Some eyewear ...

If you ever entertained your fellow students at school (while annoying teachers) with an impromptu performance involving twanging a metal ruler hanging off the edge of a desk, then you already have a ...

Size Matters: Measuring distances between molecules is no simple task, but a team of German researchers has developed a new method that could revolutionize biological research and possibly even impact ...