麻豆约拍

It's May 1996, a sudden storm has swept across Mount Everest and on the slopes Dr Ken Kamler is facing his worst ever case of frostbite. He has to 'thaw out' a frozen man.

Until she was twelve Mende Nazer lived in the Nuba mountains in Sudan. Then she was captured and sold as a slave to work in Khartoum and London. Looking back, Mende says those years were like being frozen in time.

Image: Melting glacier
Credit: Sean Gallup/Getty Images