The world's biggest desert that covers 11 countries where temperatures drop to -9C
The desert covers over 3.3 million square miles, which means it's roughly the same size as the entire United States.
Sahara desert, once lush and green, was home to mysterious human lineage, study says
Researchers studied the DNA of two 7,000-year-old naturally mummified individuals excavated in the Takarkori rock shelter in ...