ScienceAlert on MSN9d
This Ancient Scratch May Be One of Humanity's Oldest Rock Symbols
The age of the lines and how they were formed still needs to be verified, but there is a chance this may be one of the oldest ...
National Geographic news2y
Why the Nasca lines are among Peru's greatest mysteries
Some of the straight lines run up to 30 miles ... and when the top 12-15 inches of rock is removed, a light-colored, high contrasting sand is exposed. Because there’s so little rain, wind ...