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
Zombies of the Stratosphere dummy running along a wire, were first used in Republic's "Darkest Africa" (1936) and with greater impact in their "Adventures of Captain Marvel" serial (1941). "Zombies of the Stratosphere"s official release date is July 16, 1952, although this is actually the date the sixth chapter was made available to film exchanges. This was followed by the release of , which had been filmed around the productions of Zombies (three episodes before, the remaining nine afterwards) as a projected twelve-part TV series but which was theatrically issued instead. In this latter film, Judd Holdren played a masked Cody and Aline Towne