US President George Bush made all his science policy decisions, including those concerning climate change and stem cells, back in 2001 and has stuck with them ever since, writes Chris Mooney in today's Guardian. "The broadest way of stating the problem is that throughout his presidency, Mr. Bush has let politics rule everything and left virtually nothing to dispassionate analysis.

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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.