The high seas are a frontier. See Sealand or Somalia. The seas are largely a lawless system where waste dumping, flying under flags of convenience and even pira

The high seas are a frontier. See Sealand or Somalia. The seas are largely a lawless system where waste dumping, flying under flags of convenience and even piracy are fairly common practice. Which, of course, raises the issue with "frontiers". They are often very free, but also very dangerous. Antartica's not really a "frontier" in this sense. It's protected and policed by international treaty. It's also cold, which keeps people from squatting on it. Some links: http://en.wikipedia.org/wiki/Flag_of_convenience http://en.wikipedia.org/wiki/Flag_of_convenience http://ngm.nationalgeographic.com/2014/05/shipbreakers/gwin-text http://ngm.nationalgeographic.com/2014/05/shipbreakers/gwin-... http://arstechnica.com/tech-policy/2012/03/sealand-and-havenco/ http://arstechnica.com/tech-policy/2012/03/sealand-and-haven...