At Sungir we looked at one of the oldest Homo Sapien Sapien burials to be found so far:
Dolni Vestonice, Czech Republic, is famous for its graves including abundant artefacts from 27-20,000 BC. This included the Venus of Dolini Vestonice:
The grown male is prone and the adolescent seems to be pointing the womb. Deliberate of accidental? Why is the male prone and the other two supine? Questions we will never answer with certainty.
What we can say is that pre- and post-ice age people had a sense of the after-life and ways of expressing their faith in it through ritual and burial of individuals from their communities.