Somewhere it was reported that they existed to at least 19,000 years ago, in a cave on Gibralter. Also, they actually mined TIN underground in Belgium, using antlers for scraping tools(fossils found therewith). On the Discovery Special it was opined that they just didn't reproduce as fast as homo sap(2% differential).
Many Ukrainian and black Russians still sport a uni-brow, are very hairy and fashion crude tools.
That would only make sense to an evolutionist. They were too dumb to make shovels, so they used antlers to scrape cassiterite out of mines to toss in their smelters to make tin.