Sir Wikipedia is not the go to for these types of discussions. Those sites are ran by people who have biases and there are "page wars" where certain people fight against presenting evidence of all types.
The fact that the "Negroid" skulls were found in ancient Olmec sites has been verified. Only one of people has a "Negroid" (prognathic) skull, and that group is the so called "Niger-Congo" speakers of Africa today. The cultural aspects of Meso-American civilization were so uniform with ancient Nile Valley civilization.;
They practice DJED in ancient America...DJED is class Nile Valley African ceremony;
Confirmation of ancient Kemites and Nubians extensive travels to and from this area of the World is via the fact that mummies throughout the Hapi Valley have been found to have had tobacco and cocaine residue (the white "scientist" apparently acted a fool upon reading these findings, and this study addresses those concerns).
"The recent findings of cocaine, nicotine, and hashish in Egyptian mummies by Balabanova et. al. have been criticized on grounds that: contamination of the mummies may have occurred, improper techniques may have been used, chemical decomposition may have produced the compounds in question, recent mummies of drug users were mistakenly evaluated, that no similar cases are known of such compounds in long-dead bodies, and especially that pre-Columbian transoceanic voyages are highly speculative. These criticisms are each discussed in turn. Balabanova et. al. are shown to have used and confirmed their findings with accepted methods....
“The initial reaction to the findings of Balabanova et. al. was highly critical. These criticisms were not based on a known failing in the authors' research methodology, rather they were attempts to cast doubt on an implication of the research - that cocaine and nicotine were brought to Egypt from the New World before Columbus. This conclusion is not acceptable to conservative investigators of the past. In fact it suggests a deep-rooted aversion to what Balabanova suggested might mean an unraveling of aspects of history contrary to basic reconstructions. This aversion, according to Kehoe (1998) stems from the conviction that Indians were primitive savages destined to be overcome by the civilized world - that the acme of evolutionary success resided in the conquering race itself. ‘Childlike savages could never have voyaged across oceans.’ “
“Balabanova's findings bring yet other evidence forward that humanity is not so easily pinioned into the pre-conceived notions of primitive and advanced - even as this might be related to the presumed technology of earlier times. The quest for discovery - to find new worlds - is not just a modern selective advantage of our species. Perhaps it is the defining characteristic. “