In Response to: Where Collisions Are Key

Emily Carter, professor of mechanical and aerospace engineering and applied and computational mathematics, researched solar-energy science and technology with Professor Sigurd Wagner during a sabbatical. Details of the sabbatical were described incorrectly in a feature in the Dec. 2 issue.

An essay in the Dec. 2 issue on the night John Lennon died incorrectly described the portion of the Dakota apartment building that faced author Robert Morgan ’65’s apartment. It was the southern façade.

The Cavendish Laboratory moved to the West Campus of Cambridge University in 1974. The year was misstated in the Sept. 16 President’s Page.