The Empty Quarter, or Rub’ al-Khali in Arabic, is one of the world’s largest deserts. Spanning nearly 650,000 square ...

The desert covers over 3.3 million square miles, which means it's roughly the same size as the entire United States.

The Empty Quarter, or Rub' al-Khali in Arabic, is one of the world's largest deserts. Spanning nearly 650,000 square kilometers -- mainly in Saudi Arabia -- it dominates the Arabian Peninsula ...