Mark is a Forest Entomologist at Cornell University. Mark has been studying Adelgids for over 30 years starting in the Pacific Northwest and now in the east. He an expert in the battle against the hemlock woolly adelgid. He loves the outdoors in both summer and winter and is really pissed off that there is a bug that could kill all the hemlocks so he is giving the effort to save these magnificent and important trees everything he can.