by Vera H-C Chan Who says the age of exploration is dead? A lot of species share territory on Borneo , the world's third largest island, and the conservation group WWF just found 123 more . Researchers, as part of an agreement with the three countries that oversee Borneo (Indonesia, Brunei Darussalam, and Malaysia), have been poking around the rainforest in the past three years, and have found critters deep within the heart of Borneo.