The Gaanges River in India is both revered and reviled: it's worshipped as an incarnation of the divine by nearly a billion Hindus, and is also one of the most polluted rivers in the world.

Amazing images from Sir Francis Younghusband's expedition to Tibet in 1903 show a world long gone.

Could George Mallory and Andrew Irvine have bypassed the Second Step on the Northeast Ridge of Everest? View an interactive panorama and decide for yourself!