Charles Darwin attended medical school for two years at the University of Edinburgh in Scotland. While in school he joined the Plinian Society and attended their scientific debates, which frequently centered upon the merits of scientific investigation stemming from natural causes rather than divine intervention. After dropping out of medical school Darwin studied for the clergy at Christ's College at Cambridge. During his time at Cambridge he showed a fascination with nature and spent considerable time collecting species of beetles. Following graduation Darwin was invited to be a naturalist aboard the H.M.S. Beagle on its two year expedition to South America.