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

John Seiler was strolling across Virginia Tech’s campus with his students Thursday morning when something stopped them in their tracks: a sweet cherry tree with an unusual jagged scar running along it...

So when it does get cold enough for the sap to freeze, there can be a very sudden physical expansion which can sometimes lead to a crack or branches splitting, a forest health specialist with the Wisc...