The plague bacterium appears to have emerged as a human pathogen more than 5,700 years ago, evolving from a soil bacterium called Yersinia pseudotuberculosis, says Hendrick Poinar, a biologist at McMaster University, who works with ancient DNA.
—
Faye Flam,
Scientific American,
27 Oct. 2026
Only two decades ago, my family looked West for a treatment for my grandmother that was unavailable in China.
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