About 200 years ago, Antarctica was barely an idea. Today it's a world of scientific possibility. How did we get here -- and what will happen as climate change continues to threaten this pristine land and the creatures that call it home? From the PBS NewsHour, an original four-part series on Antarctica -- the continent, its creatures, the scientists and the threats that lie ahead. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders