Resin-rich sap, including pine sap ... tell us where you live and try to include a photo. We cut back our pine trees and sap dripped everywhere. It is now dry and staining the deck.

Conversely, pine trees experiencing drought-induced stress or excessive shading are rarely targeted by these beetles. Infested trees often exhibit multiple resin masses, resembling popcorn ...

Their trunks often have a craggy, uneven appearance, and there’s a simple way to tell if a tree you’re looking at is a sugar pine: Smell it. Sugar pines have an unusually sweet-smelling resin ...

Typically, amber forms over millions of years as tree resin fossilizes, but paleontologists have sped that up, creating amber-like fossils from pine resin in 24 hours. The technique could help ...