Extragalactic cosmic ray Extragalactic cosmic ray Extragalactic cosmic rays are very-high-energy particles that flow into the Solar System from beyond the Milky Way galaxy. The energies these particles possess are in excess of 10 eV. Unlike solar or galactic cosmic rays, little is known about the origins of extragalactic cosmic rays. This is largely due to a lack of statistics: only about 1 extragalactic cosmic ray particle per square meter per year reaches the Earth's surface (see figure). There are many ideas about which processes may be responsible for cosmic rays with such high energies. In the 'bottom-up' approach, cosmic rays gain more
Beyond the Hoax Beyond the Hoax Beyond the Hoax: Science, Philosophy, and Culture is a 2008 book by Alan Sokal detailing the history of the Sokal affair in which he submitted an article full of "nonsense". "The Times" writes that "Sokal's essays - and his hoax - achieve their purpose of reminding us all that, in the words of the Victorian mathematician-philosopher William Kingdon Clifford, 'It is wrong, always, everywhere and for any one, to believe anything upon insufficient evidence. But it also notes that "Beyond the Hoax": fails to reflect the fact that Sokal's concerns are now widely shared - and that