HTTP:: The Effects of Cosmic Rays
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Cosmic radiations permeate everything around us at all times of the day. Some of them are generated near us, on a radius of a few thousand light-years, while some only reach our planet after a ten- to 11-billion-year journey. They are unnoticeable to humans, but some researchers believe they may have played a crucial role in the development of life on Earth, and maybe even in some extinction events. The truth is that most of these issues are opened for debate, Space reports. However, astronomers almost unanimously agree that, if a supernova was to explode within a few light-years from our solar system, then the amount of emitted radiation would be enough to wipe out, directly or indirectly, a significant number of species. “There may have been nearby astronomical goings-on that drastically increased the radiation on Earth,†University of Illinois expert Brian Fields explains. However, he concedes, “Just finding dead beasties is not proof of a nearby supernova.†C!
osmic radiation is made up of high-energy photons, which are mostly generated by supernova explosions and the ensuing shock waves. There is, at this point, no clear way of finding out where they came from, mostly because they are prone to the influence of magnetic fields. This means that they “bounce†inside the galaxy for up to...
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