Find a tall stick. That and one good eye are all the tools you’ll need. With the stick in hand, walk exactly 11 paces from the base of the tree and mark the spot by driving the stick into the ground.

Ever needed to get the dimensions of something but don’t have a tape measure to hand? There is an iPhone app uses augmented reality to get the measurements of any object you choose, here’s how. The ...

Physicists like to share the legend of a professor who asked students how they might determine the height of a building using a barometer. The story goes on to list some of the ways you might do that.