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In this week’s Science, researchers at the Autonomous National University of Mexico created modified Bt toxins that could kill Bt-resistant insects. Their work, which involved deleting one alpha-helix from Bt toxin Cry1Ab, showed that cadherin deletion mutations in pests confers resistance to Bt toxin, and that engineered Bt toxins can overcome this resistance.

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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.