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A Spot on the X

A segment of the human X chromosome found in non-African human populations comes from Neandertals, report the Université de Montréal's Damian Labuda and his colleagues in this month's Molecular Biology and Evolution. This small section, the researchers say, is found in about 9 percent of non-Africans. Labuda and his team analyzed 6,092 X chromosomes from populations across the world and found evidence of admixture between Neandertals and humans as they migrated out of Africa. "Somewhere very early on, there was an encounter between Neanderthals and humans," Labuda tells CBC News.

The Scan

Tens of Millions Saved

The Associated Press writes that vaccines against COVID-19 saved an estimated 20 million lives in their first year.

Supersized Bacterium

NPR reports that researchers have found and characterized a bacterium that is visible to the naked eye.

Also Subvariants

Moderna says its bivalent SARS-CoV-2 vaccine leads to a strong immune response against Omicron subvariants, the Wall Street Journal reports.

Science Papers Present Gene-Edited Mouse Models of Liver Cancer, Hürthle Cell Carcinoma Analysis

In Science this week: a collection of mouse models of primary liver cancer, and more.