Reference Terms
from Wikipedia, the free encyclopedia

Petroglyph

Petroglyphs are images incised in rock, usually by prehistoric, especially Neolithic, peoples.

They were an important form of pre-writing symbols, used in communication from approximately 10,000 B.C.E. to modern times.

Note:   The above text is excerpted from the Wikipedia article "Petroglyph", which has been released under the GNU Free Documentation License.
Related Stories
 


Science News
May 22, 2017

Latest Headlines
updated 12:56 pm ET