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Sounds Like Brain Freeze

People's brains just aren't evolving as fast as they used to. Lead author Hurng-Yi Wang from Taiwan's Academia Sinica and the University of Chicago reports that, based on comparative protein analysis, the evolution of genes expressed in the brain has slowed since humans split off from chimpanzees. The chimps, though, haven't experienced this  slowdown, say the authors in PLoS Biology.

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.