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An international team led by investigators at the Salk Institute for Biological Studies in La Jolla, Calif., shows that Imp — IGF-II messenger RNA binding protein — counteracts endogenous small interfering RNAs to stabilize self-renewal factor upd RNA in Drosophila testis. "However, similar to upd, Imp expression decreases in the hub cells of older males, which is due to the targeting of Imp by the heterochronic microRNA let-7," the team writes.

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Researchers have developed a robotic lab assistant, the Verge reports.

CBC News reports Canada's Supreme Court is to rule on the constitutionality of the country's genetic non-discrimination law today.

The Associated Press reports the World Health Organization is sending experts to China to investigate the animal source of SARS-CoV-2.

In Science this week: atlas of affected cell populations in idiopathic pulmonary fibrosis, and more.