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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Mary Beckerle has been removed as director of the Huntsman Cancer Institute in what one researcher refers to as a "coup," ScienceInsider reports.

Bill Gates tells the Telegraph that bioterrorism is a serious risk.

The March for Science is to take place tomorrow, and supporters are tapping their creative energies to create placards to carry.

CBS News reports that the White House Science Fair is to continue under President Donald Trump.