This Week in Nature

In this week's Nature Communications, researchers from Aarhus University reported the whole genome sequence of the social velvet spider and a draft genome sequence of the tarantula, providing new insights into their production of venom and silk. The study points to proteins that may be involved in the processing and activation of toxins in venom and offers clues about the composition of spider silk proteins.

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US Attorney General Jeff Sessions is considering using DNA tests to determine relatedness between adult and child migrants, the Daily Caller reports.

Bloomberg reports that Brainstorm Cell Therapeutics plans to offer a treatment it is developing under the "right to try" law for hundreds of thousands of dollars.

In a proof-of-concept study, researchers report being able to determine age from dried bloodstains, Discover's D-brief blog reports.

In Nature this week: expansion of disease-resistance genes among long-lived oak trees, and more.