Lightning is 5 times hotter then the surface of the sun.

Residents of the northeastern U.S. observed a blue sun and a blue moon, caused by forest fires in British Columbia.

Melbourne (VIC) has the dubious honour of being Australia's least sunny capital with an average of 5.7 hours of sunshine each day.

In Australia, Darwin (NT) is the sunniest capital with an average of 8.5 hours a day.

Yuma in Arizona (USA) is the sunniest place in the world.