Blue Flame, Colour photograph (Giclée) by Shane Lamb. Alaskan night sky is dark from August to April. The Aurora is a natural light display caused by charged particles from the sun interacting with the earth's atmosphere. When these particles collide with oxygen, yellows and greens are produced, with nitrogen they produce reds, violets and rarely blues
75 places so colorful it’s hard to believe they’re real [pics]
Salar de Uyuni, Bolivia These 4,086 square miles in southwest Bolivia make up the world’s largest salt flat. The vast and incredibly flat plains and clear skies of Salar de Uyuni make it both one of the most famous “natural mirrors” on the planet, as well as an ideal altimeter calibration site for Earth observation satellites. 31 of 75 of the most colorful places in the world to go to.