The remarkable rock art sites—dated to between 5000 B.C. and 1500 B.C.—consist of vertical cliffs rising directly from lakes.
Prehistoric art and acoustics intertwine as researchers unveil the role of sound-reflecting cliffs in shaping ancient rock ...
Now, researchers say the rock could be a sand sculpture created to look like a blue stingray (Dasyatis chrysonata), which are often found in southern Africa. If that’s the case, the artifact could be ...