Science Hill is a planning precinct of the Yale University campus primarily devoted to physical and biological sciences. It is located in the Prospect Hill neighborhood of New Haven, Connecticut. Originally a 36-acre residential estate known as Sachem's Wood, it was purchased by the university in 1910 as a land bank. Removed from the main campus and close to the former Sheffield Scientific School, the hill was allocated to large science laboratories and the main buildings of the Yale School of Forestry & Environmental Studies. Several laboratory buildings were completed in the 1910s, but most of the campus was completed during the build-up of scientific research after World War II.