This Week in Nature

In this week's Nature Genetics, a group led by scientists from the University of Sydney reports sequencing the genome of the koala, the only extant species of the marsupial family Phascolarctidae. The researchers found an expansion within a cytochrome gene family involved in detoxification that allows koalas to live off of phenolic-rich eucalyptus leaves, and describe smell and taste receptor genes that help koalas choose which leaves to eat.

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Researchers find that historical factors influence which genes are the most highly studied, the Atlantic reports.

The US National Science Foundation's new sexual harassment policy is to go into effect next month, according to Nature News.

Researchers report using genotyping to tie together illegal ivory shipments and trace them back to a handful of cartels, the New York Times reports.

In Nature this week: genomic ancestry analysis of Sardinians, current noncoding mutations in colorectal cancer, and more.