NOT SUBBED The climate varies in different habitats across this huge and vast landscape. Across the last 50,000 years or so, beginning long before humans lived on this continent, the climate's been fluctuating, but there’s a gradual overall trend towards more dry, arid conditions. In the middle of the continent, there’s a gigantic body of water, mega lakes connected by constant river streams which at its largest can reach up to 22,000km2 in size. But it's been fluctuating quite dramatically and starting to dry out and shrink. Meanwhile the population is slowly rising. People are moving around the edges of the continent.