Desert areas are regions that receive very little rainfall, typically less than 10 inches (25 cm) per year. They are characterized by dry conditions, extreme temperatures, and sparse vegetation. Common plants found in deserts include cacti and shrubs, which have adapted to conserve water. Deserts can be hot, like the Sahara Desert, or cold, like the Antarctic Desert. Despite their harsh environments, deserts are home to various animals, such as camels and lizards, which have developed unique adaptations to survive. These ecosystems play a crucial role in the Earth's biodiversity.