Some 15 massive skulls disovered inside a cave in the Ural Mountains, where the bears went to die in late Pleistocene.
Site was a place of religious sacrifices by ancient man up to 60,000 years ago, believe experts.
Samples taken from cubs frozen in permafrost for at least 12,000 years.
'Sensational' find of two cubs, the best preserved ever seen in the world, announced today.
Examination of ancient cave lion cub offers prospect of 'oldest-ever breast milk'.
New revelations expected as Novosibirsk experts share latest ancient finds with world's leading specialists.
Experts crack prehistoric mystery over extinct babies preserved in permafrost since Ice Age, and reveal the VERY surprising colour of this 'tigerlion' species.
Unveiled: two extinct cave lions - dug from the permafrost - make their first appearance since Pleistocene times.