<p><br> A military sand dragon poses in the red sands of Australia's Alice Springs Desert Park. Although they are harsh environments, <a href="http://environment.nationalgeographic.com/environment/habitats/desert-profile">deserts</a> form diverse ecosystems with <a href="http://environment.nationalgeographic.com/environment/photos/desert-plant">plants</a> and animals that have adapted to arid living.</p>