Giant Freakin Robot
December 28, 2023
If you’ve ever been hiking in the mountainous regions of the United States, then you’ve probably come across ancient rock carvings fossilized in boulders strewn across the trails. While these petroglyphs are fun to come across while on an outdoor excursion, they can also tell us a lot about the ancient civilization that lived in these areas long, long ago. Recently, a study on petroglyphs carved into rocks in Colorado suggests that these spiral shapes could have been an ancient calendar used thousands of years ago.