A tropical desert is a type of desert characterized by high temperatures and very low rainfall, typically less than 10 inches (25 cm) annually. These deserts often have dry, sandy, or rocky landscapes and can experience extreme heat during the day, with cooler temperatures at night. Common examples of tropical deserts include the Sahara Desert in Africa and the Kalahari Desert. Despite their harsh conditions, some plants and animals have adapted to survive, such as cacti and certain reptiles, which have developed unique strategies to conserve water and endure the heat.