These Petroglyphs Helped Humans Survive the Desert

Transcript

Billboards are useful, at  least if you want to know whether you’re within two  hundred miles of a Buc-ee’s. Thousands of years ago, some  people had a similar idea by carving a huge camel into a  rock in the Arabian peninsula. That camel wasn’t signaling the  location of gas and novelty foods, but rather, something even more important: water. Toda... Read More