The largest hot desert in the world is the Sahara Desert, which spans much of North Africa. Covering an area of approximately 9.2 million square kilometers, the Sahara is well-known for its extreme weather, with scorching temperatures during the day and chilly nights. It is characterized by vast sand dunes, rocky plateaus, and sparse vegetation. The desert is home to various unique ecosystems and a diverse range of flora and fauna adapted to harsh conditions. The Sahara's size and distinctive features also make it a significant subject of study for climate scientists and researchers interested in desertification and habitat conservation.