This article in the Economist considers why rat control in Asia, where black rats are more common than the brown rats that spread in Europe, has been particularly difficult. Scientist Ken Aplin from the Commonwealth Scientific and Industrial Research Organisation in Australia just completed work indicating broader genetic diversity than expected among black rats, which could indicate why different control methods are needed.

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

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