School of Medicine. The seven colleges maintain separate housing facilities for their students and each college's buildings are differentiated by distinct architectural styles. As residential colleges were added while the university expanded, buildings in newer colleges were designed with styles that were starkly different from that of the original campus. The disparate architectural styles led Travel + Leisure, in its October 2013 issue, to name the university as one of the ugliest campuses in America, likening it to "a cupboard full of kitchen appliances whose function you can't quite fathom." In addition to its academic and housing facilities, the campus features eucalyptus groves, the Birch Aquarium and museum, and several major research centers. The Scripps Institution owns a sea port and several open ocean vessels for marine research. Several large shake facilities, including the world record holding Large High Performance Outdoor Shake Table, used for earthquake simulations, are also maintained by the university. The university has actively sought to reduce carbon emissions and energy usage on campus, earning a "gold" sustainability performance rating in the Sustainability Tracking Assessment and Rating System (STARS) survey. It was also praised in The Princeton Review's Guide to 322 Green Colleges: 2013 Edition for its strong commitment to sustainability in its academic offerings, campus infrastructure, activities and career preparation. Academic facilities When the campus opened in 1964, it consisted only of Revelle College and Scripps Institution of Oceanography. The school's rapid increase in enrollment and opening to undergraduate students over its first decade spurred major campus expansion. Muir, Marshall, and Warren Colleges were established and built during the late 1960s through 1980s as the student population continued to grow considerably. Initially, the campus followed a rough north–south axis alongside Historic Route 101, though construction in the following decades deviated from this, with the core of the campus shifting towards Geisel Library. The school's two engineering departments were merged into the School of Engineering (renamed the Jacobs School of Engineering in 1987 in honor of Irwin Jacobs, founder of Qualcomm, and his wife Joan Jacobs) in 1982. New buildings have been continually added as the division expands. Major additions include: the San Diego Supercomputer Center, completed in 1986; Powell-Focht Bioengineering Hall, completed in 2003; and the Structural and Materials Engineering building, completed in 2012. Significant construction work on the previously undeveloped northern part of campus also took place during this time. Two graduate professional schools, the