A New Tree

Armed with gene sequences, researchers led by the University of California, Berkeley's Jillian Banfield have drawn an expanded tree of life, marked by an abundance of bacteria.

"It is a momentous discovery — an entire continent of life-forms," Eugene Koonin from the National Center for Biotechnology Information, who was not involved in the study, tells the New York Times.

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The partially reinstated US travel ban leaves space for uncertainty for researchers, Nature News says.

Researchers find a number of traits differ by sex and could affect mouse model studies, according to Reuters.

Tweaking the skin microbiome could help address some skin conditions, the New York Times reports.

In PNAS this week: DNA methylation profiles of tumor tissue, gene dynamics in prokaryotes, and more.