Down at the bottom of the thing, "There's only one human race" brings to mind,
Quote:
If separate racial or ethnic groups actually existed, we would expect to find “trademark” alleles and other genetic features that are characteristic of a single group but not present in any others. However, the 2002 Stanford study found that only 7.4% of over 4000 alleles were specific to one geographical region. Furthermore, even when region-specific alleles did appear, they only occurred in about 1% of the people from that region—hardly enough to be any kind of trademark. Thus, there is no evidence that the groups we commonly call “races” have distinct, unifying genetic identities. In fact, there is ample variation within races (Figure 1B).
Ultimately, there is so much ambiguity between the races, and so much variation within them, that two people of European descent may be more genetically similar to an Asian person than they are to each other (Figure 2).
http://sitn.hms.harvard.edu/flash/2017/ ... t-century/Quote:
Does “race” still mean something?
The divisions between races are doubtlessly blurred, but does this necessarily mean that race is a myth—a mere social construct and biologically meaningless? As with other race-related questions, the answer is multi-dimensional and may well depend on whom you ask.
In the biological and social sciences, the consensus is clear: race is a social construct, not a biological attribute.
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"There are a thousand things that can happen when you go light a rocket engine, and only one of them is good."
Tom Mueller of SpaceX, in Air and Space, Jan. 2011