An international team of scientists has sequenced the DNA of two extinct Tasmanian "tigers," finding that the two animals were extremely similar to each other with only five differences in 15,492 nucleotides. Their findings suggest that the Australian marsupials, which looked like dogs but were evolutionarily more closely related to kangaroos and koalas, died out about 70 years ago because they may have become too inbred to survive.

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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.