The continent known for having both polar deserts and tropical rainforests is Australia. It features a diverse range of ecosystems, including the arid Outback and lush rainforests in the northeast. The continent also hosts unique flora and fauna, many of which are endemic to Australia. Australia's varied climate zones contribute to its geographic diversity, allowing for distinct wildlife and habitats. This unique combination of environments makes Australia a fascinating study for ecologists and geographers, as it exemplifies the rich biodiversity that can coexist on a single continent.