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"Saturn, photographed by Cassini. In what some call “the most stunning photograph ever taken”, the Cassini probe captured Saturn backlit by the Sun. What's more stunning is that Earth is visible in this photo, as a tiny dot just above the rings on the left."

"This is What Happens When Sand Gets Struck by Lightning: Fulgurites are natural hollow glass tubes formed in quartzose sand, silica, or soil by lightning strikes (at 3,270 °F), which instantaneously melts silica on a conductive surface and fuses grains together over a period of around one second. Photographed by Ken Smith."

This specimen is sometimes called the "Pink Tutu" because of its rose quartz frill. The smoky quartz formed first, then the rose quartz. Geologists suspect the pink tint comes from traces of aluminum and phosphorus.