The great majority of the land mass of Australia is either arid or sem-arid, there is very little surface water, the rain fall is low and there are very few rivers that actually run other than...
The Mojave Desert is generally considered to be a low desert, but the distinction of low and high deserts may have only limited usefulness because each desert type has lands of various elevations and...
It is a rain shadow desert, meaning the Rocky mountains in the US and the Sierra Madre Oriental in Mexico prevent clouds (and hence, their rain) to reach the area covered by this desert.