The movie is actually 5.5 for me but... It's certainly watchable, if you don't have a logical brain and not much knowledge of how things work in real life. Sadly the movie makers wanted to create an epic movie with landscape views more than accurate scene of the past. The wood and of course the food is the basis for life. In that light the first humans 20000 years ago depended heavily from these two resources. Humans moved their camps where the living food went and they most likely didn't take 300 mile trips with 10-15 men to get some food for the rest of the year... and 200 miles from nearest forest... highly unlikely. Preferred spots for long stops where with fresh water, forest nearby and animals to hunt. Nowadays findings even in deserts are showing that there was once a forest. And the people didn't look like this back then... like they stepped there from our streets. They were small and the scull had different structure not being anywhere near to a model from Gucci promo. The movie has the main character walking on totally empty land for hundreds of miles, carrying almost nothing, yet he makes fire every night. To add some dramatic look, he is coughing blood - 20000 years ago that would mean death for sure. The CGI is most of the time not seamless and is discernible. Good attempt.