The Northern Lights are the result of collisions between gaseous particles in the Earth's atmosphere with charged particles released from the sun's atmosphere. Variations in colour are due to the type of gas particles that are colliding. The most common auroral color, a pale yellowish-green, is produced by oxygen molecules located about 60 miles above the earth. Rare, all-red auroras are produced by high-altitude oxygen, at heights of up to 200 miles. Nitrogen produces blue or purplish-red aurora.
It was an experiment in the late 50s to make a speedboat with a BMW 507 engine and design. A unique beauty. But then the boat disappeared for decades, until a young guy heard of the boad, found and restored it. The BMW 507 is a very rare BMW roadster, only around 250 cars have been produced in the 1950s. And this is the only BMW 507 boat.
Small flying Ice crystals gave a stuning display in the Austrian alps 2015.
