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

Researchers believe rainfall and flooding changed the landscape of the arid desert to a green area some 8,000 years ago.

Researchers studied the DNA of two 7,000-year-old naturally mummified individuals excavated in the Takarkori rock shelter in ...

Mineral deposits in limestone caves show that the now arid interior of Saudi Arabia repeatedly experienced increased rainfall ...

Mineral formations in caves reveal recurring periods of humidity in the Arabian Desert over the last 8 million years.

One of the world's largest deserts was once home to a vast lake and river system, an international team revealed in research ...