To test this hypothesis, we analyzed echolocation calls of hoary (Lasiurus cinereus) and silver-haired (Lasionycteris noctivagans) bats recorded over 72 nights at a wind energy facility in Southern Alberta, Canada. We recorded calls at 3 heights: 67 m at turbine nacelles, 30 m at ...
One of the key problems in the theory of the origin of cosmic rays, which consist of high-energy protons and atomic nuclei, is their acceleration mechanism. The issue was addressed by Vitaly Ginzburg and Sergei Syrovatsky in the 1960s when they suggested that CRs are generated during superno...