With severe cold hitting much of the country, some unusual phenomena like "exploding trees" could be on the way. Here's what ...

Tree sap is mostly water with sugars and minerals, and like many liquids, it expands when it freezes. Gradual freezes usually ...

It turns out that trees can actually explode when temperatures drop.

As a major segment of the United States remains engulfed under a furious polar vortex, the freezing temperatures might cause ...