Remains of the child suggest an 'unknown European invasion of Siberia deep in ancient times'.
Fast track evolution as great Siberian symbol is surprisingly unmasked as an immigrant breed.
Unique remains give vital clues to man's origins and early travels, say experts.
Remains from the Zhokhov island in the East Siberian Arctic show trained sled dogs existed almost 10,000 years ago.
DNA research of Native Siberians and Native Americans revealed by Science and Nature journals.
Discovery of blood in creature frozen for 43,000 years is seen as major breakthrough by international team.
Never before has RNA - Ribonucleic acid - sequencing been carried out from so far back in time.