Wells has a remarkable ability to dig up the curious and the captivating: At one time, a worm found in a hazelnut prognosticated ill fortune. Rowan trees were planted in churchyards to prevent the dead from rising from their graves. Greek arrows were soaked in deadly yew, and Shakespeare’s witches in Macbeth used “Gall of goat and slips of Yew” to make their lethal brew. One bristlecone pine, at about 4,700 years old, is thought to be the oldest living plant on earth. All this and more can be found in the beautifully illustrated pages (themselves born of birch bark!) of 100 Trees.