Swimming 1km, in the middle of the winter, in Siberia, at water temperature of zero Celsius and air temperature below -30C.
An extraordinary adventure, blessed by the Queen of England and the Tsarina of Russia.
Satellites show giant hole ringed by 20 'baby craters'.
Hidden video footage helps scientists learn more about female Amur leopards.
Dudinka marks beginning of its 350th year with amazing New Year light show.
Crown Prince's spaniel saw the Romanov family gunned to death before his epic escape.
Royal discovery made after 99-year-old code is broken by Siberian mathematics genius.
Unearthed on the edge of the Arctic, she is the only woman so far found in an otherwise all-male necropolis, buried in a cocoon of copper and fur.