Geography is very important in ecology. Two major systems have been designed to model this, island biogeography and metapopulations. The idea of metapopulations is more recent, and has emerged as the dominant theory. Metapopulations are populations in multiple neighboring areas. The population of a species in any individual area may go extinct, but the metapopulation still survives. The theory of metapopulations has gained momentum in recent years because of its applications to epidemiology, the study of diseases.
As one of the world's great universities, Yale traces its roots back to the early 1640s when colonial clergyman sought to establish a school in order to continue the tradition of European education within the Americas. Yale has now grown to educate over 11,000 students from over 100 countries on a 310-acre campus in New Haven, Connecticut. Within the school's 260 buildings are over 2,000 undergraduate programs in 65 departments taught by a distinguished faculty. As Academic Earth's first partner school, Yale has been a leader within the space of OpenCourseWare by consistently delivering on its esteemed mission to expand access to educational materials for all who wish to learn.