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A new study shows that in human muscle, mitochondrial DNA mutations arise near the cell nucleus where they trigger molecular changes that promote their own proliferation.

A Mailman study of more than 1 million pregnancies in Finland reports that prenatal exposure to elevated levels of DDT is associated with an increased risk for autism.

Understanding why most children are healthy–and how that can reveal new treatments for the sick–is the driving motivation of Columbia’s new chair of pediatrics.