Mark this point on the stick, then measure the distance to the ground. The measurement you get in inches will be roughly the same as the height of the tree in feet.

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 ...

Forests protect against avalanches, but not every forest is equally effective. Thanks to almost 50 years of observations at ...