Scientists have recently identified electrons and positrons with the highest energies ever recorded on Earth. They provide evidence of cosmic processes emitting colossal amounts of energy, the origins ...
Want to see cosmic rays? You might need a lot of expensive exotic gear. Nah. [The ActionLab] shows how a cup of coffee or cocoa can show you cosmic rays — or something — with just the right ...
which in turn generate a spectrum of electrons and positrons hard enough to achieve the PAMELA and ATIC signals, while safely avoiding the overproduction of cosmic-ray antiprotons. To accommodate ...