This winter has been harsh, especially in the Midwest and East Coast, but in just a couple weeks, on Groundhog Day, we'll ...

Shadows are created when an object blocks light from the Sun or another light source. When the light can't pass through the object, it makes a dark spot on the ground or wall behind it ...

It can be equipped with a single-axis or double-axis tracking system, which produces a dynamic, controlled shadow on the ground. “The shadow precision on the ground, as well as shadow dynamics ...