Vasco da Gama
Where did he explore , who was already living there ?

Explanation: The Portuguese nobleman Vasco da Gama (1460-1524) sailed from Lisbon in 1497 on a mission to reach India and open a sea route from Europe to the East. After sailing down the western coast of Africa and rounding the Cape of Good Hope, his expedition made numerous stops in Africa before reaching the trading post of Calicut, India, in May 1498. Da Gama received a hero’s welcome back in Portugal, and was sent on a second expedition to India in 1502, during which he brutally clashed with Muslim traders in the region. Two decades later, da Gama again returned to India, this time as Portuguese viceroy; he died there of an illness in late 1524.

there has only been 12 presidents. the 12th president is/was moon jae-in

well that depends on how deep the hole is. you'd first go through te crust of the earth, then the upper mantle, then the lower mantle then the outer core, then the inner cor then you'd be stuck in the core to melt.