Earthwatch Institute is an international non-profit organization that was founded by Robert A. Citron as Educational Expeditions International in 1971 near Boston (USA). It is one of the largest global underwriters of scientific field research in archaeology, paleontology, marine life, biodiversity, ecosystems and wildlife. For over forty years, Earthwatch has delivered a unique citizen science model to raise funds and recruit individuals, students, teachers and corporate fellows to participate in critical field research to understand nature's response to accelerating global change. Earthwatch's work supports hundreds of Ph.D. researchers across dozens of countries, conducting over 100,000 hours of research annually.