Felling a Tree (3 min) tv-pg Play video Select your TV provider to log in to have full access to videos Select your TV provider See all providers Don't see your TV provider? Learn more You can access this video on the free HISTORY® iPad and iPhone app. Don't have the HISTORY® app? Your Parental Control settings do not allow you to view this content. Felling a Tree (3 min) tv-pg John Garland, a consulting Forest Engineer, tells us that in order to fell a tree you have to understand art and science.