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Researchers at the Scripps Research Institute, the University of California, San Diego, and elsewhere outline a potential role for exosomes in neuronal circuit development. The team tracked the effects of isolated exosomes, demonstrating that exosomes released by human induced pluripotent stem cells (hiPSC) could prompt neural cell cultures to proliferate and differentiate, for example, while rodent exosomes appeared to boost neuronal proliferation in the dentate gyrus region of the mouse brain.

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A letter criticizing actions by the US government and research institutions toward Chinese and Chinese-American scientists has garnered more than a hundred signatories.

NPR reports that researchers in New York are investigating whether it is possible to edit the genomes of human sperm.

In an opinion piece at the Nation, Sarah Lawrence College's Laura Hercher argues that everyone should be able to access prenatal genetic testing.

In Nature this week: ancient DNA uncovers presence of Mediterranean migrants at a Himalayan lake, and more.