| Feature | Sahara Desert | Atacama Desert |
|---|---|---|
| Location | North Africa (11 countries) | South America (Chile, Peru) |
| Area | 9.2 million km² (3.6M sq mi) | 1.05 million km² (405k sq mi) |
| Climate Type | Hot desert (BWh) | Cold coastal desert (BWk) + fog zone |
| Avg Temperature | 30°C (86°F) | 18°C (64°F) |
| Precipitation | <25 mm/yr | <5 mm/yr (driest non‑polar) |
| Landforms | Sand dunes (ergs), hamadas, mountains | Rocky plateaus, salt flats (salars), dunes |
| Flora | Sparse: acacia, grasses, succulents | Very sparse: cacti, tillandsias, lichens |
| Fauna | Camels, addax, fennec, reptiles | Vicuña, guanaco, flamingos, foxes |
Sahara is vast, hot, sandy; Atacama is smaller, cooler, fog‑influenced, mineral‑rich.