The story of how Neanderthal DNA made its way into the human genome may be a bit complex. As Carl Zimmer writes at the New York Times, two recent papers indicate that there were varying numbers of interbreeding events between Neanderthals and the ancestors of different modern human populations.

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New results from the NASA Twins Study indicate that the immune system may rev up when in space, the Washington Post reports.

Kelvin Droegemeier, the new science advisor, spoke at the American Association for the Advancement of Science meeting, Geekwire reports.

In PNAS this week: whole-genome assembly for the white shark, paper-based microfluidic method for detecting the malaria parasite, and more.

The World Health Organization has announced the members of its gene-editing committee, according to NPR.