Researchers now have a better understanding of how these paintings were created some 35,000 years ago.

STONES, BONES, AND WRECKS
The red ochre pigment might have been used for art or to color animal skins.
The analysis supports the theory that Earhart died a castaway.
Every year, billions of dollars in ancient artifacts and other cultural objects are looted and sold around the world. A new project is training dogs to sniff them out.
The bones were found near Bellamy's ship, the Whydah, which wrecked off the coast of Massachusetts in 1717.
In the late 9th century, Vikings across Scandinavia banded together to invade England.
And you can buy some of it.
The ship arrived in Alabama in 1859 in defiance of a law that prohibited importing slaves to the U.S. To hide the evidence of its illegal venture, its captain burned and sunk the ship, and its wreck has been lost to history. Until now.