Locals hear 'booms from the underworld' in giant ravine but now scientists say it holds secrets of the planet's past.
New revelations expected as Novosibirsk experts share latest ancient finds with world's leading specialists.
Experts say no sign of any human settlements close to 'largest necropolis in Asia for the extinct beasts'.
Running water is one of the most soothing and relaxing sounds known to man, but here it signals the rapid thawing of ground frozen for thousands of years.
Experiment shows multi-purpose tool can still be used for butchering: it highlights the skills of these extinct early humans.
'Sensational' find of two cubs, the best preserved ever seen in the world, announced today.