The most common opinion about human presence in Arctic is around 35,000 years ago. But a very important excavation of a woolly mammoth, made in 2012 by Alexei Tikhonov an his fellows, made the whole previous researches vague.
A recent study, about this prehistoric mammoth published in US journal Science, suggests that humans were living in central Siberian Arctic for around 45.000 years ago. 10,000 years earlier than what we thought.
The excavated structure of the male woolly mammoth bears many signs of hunting and prey. That makes it quite vivid that humans were there to hunt the mammoth down.
The carcass of the mammoth exhibits a several weird injuries on the areas of cheek bones, ribs and mandibles. And most importantly the right sided tusk of the mammoth bears signs of chopping that show the efforts to cut it down. (Thats very humane quality). This excavation site is situated in Siberia near Kara Sea.
They wrote in Journal,
Apparently, humans’ ability to survive in the Arctic environment, and their spread within the region as early as 45 ka (thousand years ago), represents an important cultural and adaptational shift,”