It will only disappear if earth disappears. It won't!
People disappear by falling into a crevasse, by slipping under the sea ice or by wandering off alone in to the Antarctic wild.
no
Possibly.
Antarctica has not ever been involved in war.
Yes but only very rarely - that is why Antarctica is a desert.
There is no city -- nor has there ever been a city -- in Antarctica.
No.
Antarctica
There is no evidence that Christopher Columbus ever reached Antarctica.
no
Yes, some things can disappear. By disapear, if you mean visually, sure; it happens all the time.