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On his blog, Mike the Mad Biologist tries to figure out why some scientists do not use positive and negative controls in their experiments. He points to a 2004 study that found 91.3 percent of Streptococcus pneumoniae had a TEM-1 beta-lactamase resistance gene, but was run without adequate negative controls.

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The World Health Organization will be providing low-cost COVID-19 tests to low- and middle-income nations, according to Reuters.

Nature News examines how the confirmation of Amy Coney Barrett to the US Supreme Court could affect scientific agencies.

Nobel Prize-winner Arthur Ashkin, who developed optical tweezers, has died at 98, the Washington Post reports.

In PNAS this week: altered gene expression in brain samples from Alzheimer's disease patients, effects of gene mutations found in bladder cancer, and more.