Eventually they will figure out what we can already surmise from statistics, that there are multiple human species currently living on this planet.
From Zanzibar to Barclay Square, They’re cousins. Identical cousins in every way.
Apart from the beings commonly known as "people" please give examples of other such species.
....was it the middle finger?
Huh?
Different human beings, whether Aboriginal Australians, Irish, Finnish, Khoi-San, Eskimo etc. can sexually reproduce with each other with no issue at all.
We are not separate species or even sub-species
Neanderthals were, in my opinion a sub-species on teh border of becoming a separate species (the later "on the border" is speculation) as non-sub-saharan African populations DID interbreed with homo neanderthalis
But no, a person from Ghana is not a separate species or even sub-species from a person from the Shetland islands.