Sahara Desert is the largest sand desert in the world.

Explanation:
The Sahara Desert, located in North Africa, is the largest hot desert in the world and covers an area of approximately 9.2 million square kilometers. It stretches across several countries including Morocco, Algeria, Tunisia, Libya, Egypt, Mauritania, Mali, Niger, Chad, and Sudan. The desert is characterized by its vast expanse of sand dunes, rocky plains, and barren landscapes.

- Size and Location:
The Sahara Desert spans over 9.2 million square kilometers, making it larger than the other sand deserts in the world. It occupies a significant portion of North Africa, stretching from the Atlantic Ocean in the west to the Red Sea in the east, and from the Mediterranean Sea in the north to the Sahel region in the south.

- Climate and Temperature:
The Sahara Desert is known for its extreme climate and high temperatures. It experiences very little rainfall, making it one of the driest places on Earth. The daytime temperatures can soar above 50 degrees Celsius (122 degrees Fahrenheit), while the nights can be extremely cold. The desert experiences significant temperature fluctuations between day and night due to its low humidity and lack of vegetation.

- Landforms and Wildlife:
The Sahara Desert is characterized by its diverse landforms. It consists of vast sand dunes, rocky plateaus, gravel plains, and salt flats. The sand dunes, known as ergs, can reach heights of up to 180 meters (590 feet). Despite its harsh conditions, the Sahara Desert is home to a variety of desert-adapted wildlife such as camels, desert foxes, scorpions, and reptiles. It also supports some nomadic communities that have adapted to the desert's harsh environment.

- Human Influence:
The Sahara Desert has been inhabited by humans for thousands of years. Various ancient civilizations, including the Egyptians, Berbers, and Tuaregs, have left their mark on the desert's history and culture. The desert also serves as a trade route for the trans-Saharan trade, connecting sub-Saharan Africa to the Mediterranean region.

In conclusion, the Sahara Desert is the largest sand desert in the world, covering a vast area of North Africa and characterized by its extreme climate, diverse landforms, and unique wildlife.