Palaeontologist says osteoporosis could have been major contributor, brought on by a lack of minerals in habitat from climate change.
More than 20 calves born although park keepers say there could be more.
Former paratrooper conscript Timofey Menshikov wanted to escape modern life - and vodka - now faces reunion with family he left behind.
Girl, 4, tried to mimic a character from a Ladybug cartoon, say Yakutsk police.
Bones of 11 extinct giants discovered, plus one woolly rhinoceros: but why did they die here?
Our map shows the attacks by bears on humans across a swathe of Siberia and the Russian Far East.