Gịnị bụ aha nna onye isi ala ahụ? N'iburu ajụjụ nke mbụ n'uche, dee ihe gbara ya gburugburu bụ́ nke ga-enye azịza ya. Ọ nwere ike ịbụ 1 - 20 ahịrịokwu. Ihe ndị gbara ya gburugburu:
Otu n'ime ndị bụ́ isi n'atụmatụ nke ihe a gaje ịza Alaeze Ukwu America, bụ onye ọkà mmụta ala aha ya bụ Isiah Bowman. Bowman bụ onye nduzi nke American Geographical Society na 1914. Afọ atọ ka e mesịrị na 1917, a họpụtara ya ka ọ bụrụ onye isi ala Woodrow Wilson na-enyocha na 1917. Nnyocha ahụ bụ echiche nke Onyeisi ala Wilson na ndị nnọchianya America si Nzukọ Udo Paris. Ebumnuche nke nnyocha a bụ iwulite ihe ga-eme ka United States bụrụ onye edemede nke 'ụwa ọhụrụ' nke a ga-eji usoro ọdịdị ala mara. N'ihi ọrụ ya n'ime nchọpụta ahụ, a bịara mara Isiah Bowman dị ka ọkà mmụta ọdịdị ala nke Wilson.