Lightning Struck

Lightning struck the sky above the Israeli coastal city of Netanya, north of Tel Aviv.  (Jack Guez/AFP/Getty Images )

Surface Melt Water

Surface melt water rushed along the surface of the Greenland Ice Sheet through a supra-glacial stream channel, southwest of Ilulissat...

Swirls of Green and Red

Swirls of green and red appeared in an aurora over Whitehorse, Yukon. The aurora was due to the interaction of a coronal mass ejectio...