Mount Sinabung spews pyroclastic smoke as seen from Tigapancur village in Karo district on November 2013 in Medan, Sumatra, Indonesia. Up to residents have been evacuated from five villages in North Sumatra due to the volcanic eruptions of Mount Sinabung.
The stunning image is of a rainbow cloud, captured above Mt Everest by Oleg Bartunov whilst on an expedition in the Himalayas, Nepal. The amazing rainbow effect is created when tiny ice crystals in the water vapour of the clouds reflect the sunlight.
"Little Boy" was the codename for the atomic bomb dropped on Hiroshima on August 1945 by the Boeing Superfortress Enola Gay. It was the first atomic bomb to be used as a weapon. *Photo by Yoshito Matsushige from miles away.