Future of Earth the ozone layer that protects the surface from ultraviolet (UV) radiation from the Sun. An increase in UV-B radiation of only 10–30% is sufficient to cause a significant impact to life; particularly to the phytoplankton that form the base of the oceanic food chain. A supernova explosion at a distance of 26 light years will reduce the ozone column density by half. On average, a supernova explosion occurs within 32 light years once every few hundred million years, resulting in a depletion of the ozone layer lasting several centuries. Over the next two billion years, there will be about 20
Triangle of the Sun Triangle of the Sun The Triangle of the Sun is a tourist area in the state of Guerrero that runs through the Sierra Madre del Sur of that state. This tourist area is formed by the cities of Acapulco in the south, the pair of Ixtapa-Zihuatanejo in the north, and Taxco in the center of the state. These cities are those that receive more tourists in Guerrero. Acapulco is the largest port city and populous state of Guerrero and the most visited by tourists and internacionales. This destination got its fame from the 50's and 70's also becoming a favorite