Vadim Klabukov, 23, paid with his life after flouting safety rules when he went to retrieve lost backpack in South Kamchatka nature reserve.

Shots fired at island campsite to scare away beast which then drops ancient limb preserved in permafrost since prehistoric times.

Most northerly palaeolithic site found on Arctic island of Stolbovoy, part of lost continental link between Siberia and Alaska, believe scientists.

A giant furry octopus? Remains of a woolly mammoth? An unknown primeval creature from the deep?

Experts surmise this first-ever discovery proves existence of a distinct species of dwarf mammoths, different from stunted beasts that existed ahead of extinction.