Giant natural balls in the Franz Josef archipelago that leave scientists flummoxed.

But how did ancient artists create prehistoric masterpieces on sheer cliffs today only accessible by sophisticated modern climbing equipment?

Mummified archer turns up in remote museum after locals refused to hand him over to the Hermitage in St Petersburg.

Image goes on display at new Tobolsk museum dedicated to the exile of Nikolai II and family shortly before they were shot.

It now seems likely in a matter of years; before this, the first bison since their extinction 10,000 years ago will be re-introduced.