A new paper* published in the journal Medical Hypotheses makes a daunting claim about Homo sapiens – that we should split our species into various subspecies.
I to know about speciation, since I study it with regard to endangered species in the US. Splitting off species and subspecies has been done in many different ways for as long as we’ve been doing it, and there’s no set way of going about it. It’s about as fuzzy as the difference between language and dialect.
Nowadays, it’s generally done by looking at genetic markers. At X difference (greater than Y difference), we split into Y and Z, two separate species. At Y difference (less than X difference), we split A and B, two separate subspecies.
At some point, geographical territories overlap, and two species are discovered to be breeding. In birds, a lot of times we then decide that they are not…
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