What Lies Beneath the Desert Sands?

The video explains how deserts form, focusing on the rain shadow effect where mountains block moisture, leading to dry regions. It describes how deserts evolve over time due to weather patterns, lack of vegetation, and temperature shifts. The formation of sand through erosion and temperature changes is discussed, highlighting its role in shaping desert landscapes. The video also covers the dynamic nature of deserts, including dune formation and the exposure of bare earth.

What percentage of deserts is covered by sand, and what does the bare earth reveal?

How do ecosystems at the edges of deserts change as the desert expands?