RT @SciencePorn: One of the rarest weather phenomena, Mammatus Clouds. Photo taken by John C. Olsen in Hastings, NE http://t.co/vdHGefOt4P

One of the rarest weather phenomena, Mammatus Clouds. Photo taken by John C. Olsen in Hastings, NE http://ift.tt/1krOhE2

— SciencePorn (@SciencePorn) March 14, 2014

Scritto su Twitter http://ift.tt/1dQ1z7o

March 14, 2014 at 10:33PM