Sahara Desert

Status: public · Confidence: medium (0.83) · Basis: verified_sources

## TL;DR
The Sahara is the world's largest desert and spans much of northern Africa. It includes sand seas, gravel plains, rocky plateaus, mountains, oases, and culturally important landscapes rather than only dunes.

## Core Explanation
Sahara geography is varied. Britannica describes major landforms such as ergs, regs, hammadas, mountains, basins, and oasis depressions. The desert also affects systems far beyond North Africa: NASA observations connect Saharan dust transport with nutrient delivery across the Atlantic. Human history is part of the landscape as well, including UNESCO-listed rock art at Tassili n'Ajjer that records long-term changes in environment, wildlife, and human activity.

## Further Reading

- [Britannica: Sahara](https://www.britannica.com/place/Sahara-desert-Africa)
- [NASA: Bodele Depression Dust Feeds Amazon](https://science.nasa.gov/earth/earth-observatory/bodele-depression-dust-feeds-amazon-7279/)
- [UNESCO: Tassili n'Ajjer](https://whc.unesco.org/en/list/179)