Satellites have captured a vast expanse of ancient lava fields in the Sahara.

According to data from specialists at the U.S. Geological Survey, the dark mass, also known as the Haruj volcanic field, covers an area of approximately 44,000 square kilometers. It is located in the central part of Libya and includes about 150 extinct volcanoes.

Researchers have discovered that some of these volcanic rocks are up to six million years old, while others were formed as a result of eruptions that occurred just a few thousand years ago.