Unless you are intent on making your own maple syrup, you probably haven't given tree sap much thought. So, let's take a deeper dive into a tree's 'blood' or sap and the normal flow in the fall for ...

AUBURNDALE, Wis. (WSAW) --- Students at Auburndale Middle/High School learn maple tree tapping in their school forest as part of their Agriculture class in what the teacher says is a decent maple sap ...