there was quite a long period of pre-history where homo sapiens were living alongside other branches of humans - around 300,000 years ago there could have been

there was quite a long period of pre-history where homo sapiens were living alongside other branches of humans - around 300,000 years ago there could have been as many as 8 (!) other species of humans running around. I imagine we developed the uncanny valley sense during a period like that.