Sahara: Largest Hot Desert, Not Second Largest Overall

The Sahara is the world's largest HOT desert (9.2M km²), but it is the third-largest desert overall:

1. Antarctic Desert (Cold): ~14.2 million km²
2. Arctic Desert (Cold): ~13.9 million km²
3. Sahara (Hot): ~9.2 million km²

Desert Definition: Area receiving ≤ 250 mm (10 in) annual precipitation. Temperature is irrelevant. Antarctica and Arctic qualify as polar deserts—vast, icy, and hyper-arid.

Thus, "Sahara is the second biggest desert" is incorrect. It is the largest hot/subtropical desert, a critical distinction for climatology, ecology, and geography accuracy.