Archive for 2020

WE HOMO SAPIENS ARE JUST IRRESISTIBLY SEXY: Neandertals have adopted male sex chromosome from modern humans. “These Y chromosome sequences now provide new evidence that Neandertals and early modern humans met and exchanged genes before the major out of Africa migration—potentially as early as 370,000 years ago and certainly more than 100,000 years ago. This implies that some population closely related to early modern humans must already have been in Eurasia at that time. Surprisingly, this interbreeding resulted in the replacement of the original Neandertal Y chromosomes with those of early modern humans, a pattern similar to what has been seen for Neandertal mitochondrial DNA in an earlier study.”

WHEN YOU CAN’T TRUST THE NUMBERS (CONT’D): Researchers find wide variance in accuracy of COVID-19 antibody tests. “The 10 tests evaluated in the study proved between 61% and 87% accurate at correctly identifying blood samples as positive for antibodies for the new coronavirus, the data showed. The same tests were between 82% and 100% accurate at identifying samples negative for antibodies, the researchers said.” To be fair, most medical tests are a lot less accurate than people tend to assume.