Add Yahoo as a preferred source to see more of our stories on Google. Getty Images Unless you are intent on making your own maple syrup, you probably haven't given tree sap much thought. So, let's ...

Tree sap is the sticky substance you sometimes see oozing out of tree trunks. Pure maple syrup is the most widely known edible sap product, derived from the sap of the maple tree, but there are many ...

It’s 1 p.m. in the afternoon. A layer of snow coats the ground and the small, wooden building tucked away on the side road off of Horsebarn Hill. All is quiet — save for the rumble of a truck engine ...