An "asperatus" cloud rolls over New Zealand's South Island in an undated picture. This apparently new class of clouds is still a mystery. Photograph courtesy Merrick DaviesExperts suspect asperatus clouds' choppy undersides may be due to strong winds
The Messengers: Taken on May this was a dissipating low precipitation thunderstorm near Broken Bow, Nebraska, that produced one one of the best lightning shows I have ever witnessed in my storm chasing career.
Milky Way Galaxy Doomed to Head-On Crash with Andromeda: The sky is seen at night just before the predicted merger between our Milky Way galaxy and the neighboring Andromeda galaxy, in this NASA photo illustration released May 2012