This Week in Nature

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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An artificial intelligence-based analysis suggests a third group of ancient hominins likely interbred with human ancestors, according to Popular Mechanics.

In Science this week: reduction in bee phylogenetic diversity, and more.

The New York Times Magazine looks into paleogenomics and how it is revising what's know about human history, but also possibly ignoring lessons learned by archaeologists.

The Economist reports on Synthorx's efforts to use expanded DNA bases they generated to develop a new cancer drug.