Mary Shelley evening, the discussions turned to the nature of the principle of life. "Perhaps a corpse would be re-animated", Mary noted, "galvanism had given token of such things". It was after midnight before they retired, and unable to sleep, she became possessed by her imagination as she beheld the "grim terrors" of her "waking dream", her ghost story: She began writing what she assumed would be a short story. With Percy Shelley's encouragement, she expanded this tale into her first novel, "Frankenstein; or, The Modern Prometheus", published in 1818. She later described that summer in Switzerland as the moment "when I
Prometheus (tree) two distinct sub-populations, one of which is accessible by a popular interpretive trail. Prometheus, however, grew in an area reachable only by off-trail hiking. In either 1958 or 1961, a group of naturalists who admired Prometheus's grove gave names to a number of the largest or most distinctive trees, including Prometheus. Currey originally estimated the tree was at least 4844 years old. A few years later, this was increased to 4862 by Donald Graybill of the University of Arizona's Laboratory of Tree-Ring Research. These ring counts were done on a trunk cross-section taken about 2.5 m (8 feet) above the