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Using genome-wide scans, the New York Times' Nicholas Wade says that researchers are searching for evidence of recent natural selection in the human genome, adding that the recent finding that Tibetans have a set of genes that allow them to live in areas of low oxygen could "be the most recent known instance of human evolution." These studies have had a stutter-start, he says, but signals of selection may be seen in genes involved in diet and skin color and are more commonly seen in people of East

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The Wall Street Journal reports on gaps in COVID-19 testing affecting less affluent urban areas and rural locations.

According to NBC News, new SARS-CoV-2 variants are making it harder for researchers to model the course of the pandemic.

The New York Times reports that experts say President Joe Biden's goal of vaccinating 1 million people a day in the US in the next 100 days is too low a bar.

In Science this week: single-cell lineage tracing technique applied to study lung cancer metastasis, and more.