/sci/ - Science & Math

>>12131454
>humans have never been isolated from each other
This is just wrong. big wrong. so wrong you look stupid.
Remeber 2000 years ago when the romans sailed to america?
That movement of asians into nw europe 1000 years ago?
Those stories about sub saharan africans travelling to japan?

What drug do you have to take to believe this hogwash and where can i get some?
Funny using the same DNA techniques it has now been agreed in the scientific community there are four giraffe species, but humans are all the same right?

>>12055272

>>11851152
I mean what do you want? Textbook recomendations? an article? Look up principle component analysis on google if you are completely new.

By unarguably trustworthy do you want a paper proving the method is valid for providing a physical basis for categorization. In which case i can point to the use of a similar method to establish different species of giraffe ( there are 4) when it was previously thought there was one species and 9 subspecies. There have been no attempts to retract this paper and, as far as I am aware, was received without controversy. Funny how this stuff is uncontroversial when applied to other species eh?
https://www.cell.com/action/showPdf?pii=S0960-9822%2816%2930787-4

>>11802648

>>11696407
Lets compare the scientific communities response to two genetic analyses. One on giraffes (Which all look very similar) - the genetic analysis found four SPECIES based on principle component analysis.
https://www.cell.com/action/showPdf?pii=S0960-9822%2816%2930787-4
https://www.cell.com/cms/10.1016/j.cub.2016.07.036/attachment/6fb151eb-1b03-4b6c-a97e-d68d10731352/mmc1.pdf

Exactly the same method applied to humans gives approx six "variations" - because we cant say humans subspeciate that would scare people.
https://pubmed.ncbi.nlm.nih.gov/18292342/
https://science.sciencemag.org/content/sci/suppl/2008/02/21/319.5866.1100.DC1/Li_SOM.pdf

Is this not scientific?

>>11696397