Antarctica is a very remote place, even today it takes a long time to travel there. And Antarctica hasn't got any permanent population, so there are no cities, almost no infra structure or anything. There's a couple of research stations and that's pretty much it. Not much capacity to take in visitors.
There are a couple of mid-sized cruise ships approved for passenger traffic in heavy ice who tours the area which make up the bulk of antarctic tourism.
because it is cheap.
Technology
they have been increased
With the advances of technology- especially flight it has increased. Even with threats of terrorism, tourism continues to increase.
One way that tourism has changed is because of the improved technology, for example, the invention of airplanes has made it easier for people to travel, furthermore, flights are cheaper and more people are able to afford holidays abroad.
Everything except finding animals trapped in ice
You are over Antarctica in an airplane, probably.
scientists use it for research with diseases tourism fishing and over fishing resources e.g. oil, fossil fuels... sorry don't know any more :) hope this has helped
Would you like to narrow that down a bit? "Before man came to earth" covers a period of roughly 5 billions years. Over that time, the temperature in Antarctica changed a great deal, both up and down. For that matter, over much of that time, Antarctica was not even located at the South Pole.
The CFC's cause ozone depletion. They are carried over to Antarctica by westerlies.
Ozone deplete over antarctica. It is because of low temperatures.
in 1925 Richard byrd flew over antarctica