Ancient North Americans gouged elaborate rock art into a heap of big boulders northeast of Reno, Nev., more than 10,000 years ago and perhaps 15,000 years ago. That makes the carvings the oldest known petroglyphs on the continent, according to a paper published in the Journal of Archaeological Science.
via N. America’s Oldest Known Petroglyphs Discovered In Nevada : NPR.
This is pretty nifty, if you ask me and clearly you have because you are reading this blog. But, this may help track migration patterns and determine from where and when the Native Americans arrived.
So was that before or after they were all wiped out by a space impact?
From Chesterton’s The Everlasting Man, 1925 on a schooled boy viewing the artistic abilities of cave men:
“It must surely strike him as strange that men so remote from him should be so near, and that beasts so near to him should be so remote.”