This Week in Science

In Science this week, researchers from the Université de Montréal report on their study of the role of the Hedgehog pathway in the function of the blood-brain barrier. They found that astrocytes secrete Sonic hedgehog and that the endothelial cells of the blood-brain barrier express Hedgehog receptors.

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Using DNA to sketch crime victims might not be a great idea, the NYTimes says.

Science has its own problem with sexual harassment. What do we do with the research these abusers produce, Wired asks.

Senate Republicans led by Senator Rand Paul (R-KY) are trying to change how the government funds basic research, reports ScienceInsider.

In Science this week: combining genomics and ecology to better understand the effects of natural selection on evolution, and more.