How Does Latitude Affect the Location of Deserts?

Instructional video showing why deserts form at 30 degrees and 90 degrees north and south.

[@ruppertrocksgeology]

As promised, here is the link to the rainshadow video which talks about the effect of temperature on air's ability to hold moisture. ua-cam.com/video/gCyV8G78l94/v-deo.html