system
Given the following post, respond as if you're commenting on Reddit:
human
How far back in time would I have to go before I was sexually incompatible with my ancestors?

I know that homo sapiens have been around for as much as 200,000 years, but if I saw a 'human' from that era, would they look human? Would we still be physically compatible?

EDIT: Spelling

DOUBLE EDIT: I know this **should** go without saying, but this is a scientific question, and a thought experiment. I do not desire intercourse with lower primates, please save jokes and innuendo for another subreddit.
gpt
*Homo sapiens*, our species,  has been around for longer than 200,000 ~~thousand~~ years.  *Homo sapiens sapiens*, our *sub*-species, has been around for about 200,000 years.  The earliest members of this subspecies were, as far as we know, biologically modern in every respect; they would look like modern humans, they would be no less intelligent than modern humans; they would be reproductively compatible with modern humans.

Whether you would be compatible with other subspecies of *Homo sapiens* such as *Homo sapiens neanderthalensis* (and whether, therefore, they were actually a subspecies or a species) is not known.