Mathew Damon posted an update in the group
Discovery 10 months, 3 weeks ago
The Largest Known Cave Art In North America Has Been Discovered In Alabama. The Artwork, A Native American Drawing, Had Remained Unseen For More Than 1000 Years Before It Was Found In A Cave That Was First Discovered In 1998. The Giant Artworks, Which Could Depict Spirits Of The Underworld, Was Discovered Using A 3D Scan Method.