The historical circumstance of interest is that the tropical rain forests have persisted over broad parts of the continents since their origins as stronghold of the flowering plants 150 million years ago.

" Wilson (born June 10 1929) is an American biologist researcher (sociobiology biodiversity) theorist (consilience biophilia) naturalist (conservationist) and author. O. His biological specialty is myrmecology the study of ants on which he is considered to be the world's leading authority.