Sa Melabrina is a Downy Oak tree the size of a small church, draped in moss and ferns. Her ancient arms spread wide in the surrounding forest near Illorai, Sardinia. She's the oldest and largest of her kind in all of Europe. And she's been standing here in these mountains for nine centuries. What she symbolizes is even greater than her beauty. The town’s mayor organized a remarkable conference drawing scientists, conservationists, and community leaders from across Sardinia and beyond, all uni...