This Week in Science

In this week's Science, an international team of researchers reports the results of an analysis of microbes from the gut of a 5,300-year-old European glacial mummy, which provides new insights into ancient human migration. Given Helicobacter pylori's prevalence as a human pathogen, various strains of the stomach bacterium have evolved as humans have migrated around the world. In their study, the investigators took samples from the ancient man's gut and analyzed them for H.

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CNN reports that researchers have tied a new variant to opioid addiction risk.

Organoids derived from patients' tumors may help determine what chemotherapy treatment patients would benefit from, according to New Scientist.

An initiative from GenomeAsia 100K hopes to increase the number of South Asians in genetic research, according to NBC News.

In Science this week: genomic analysis of ancient and modern horses indicates population turnover, and more.