This article originally appeared on Palm Springs Desert Sun: History: Look closely to see 'hidden' rock houses, other handmade structures across desert Machined edges, sharp angles, spans of glass ...

If you buy through a BGR link, we may earn an affiliate commission, helping support our expert product labs. A group of scientists has discovered a hidden layer of molten rock under the Earth’s ...

These masterful works, etched onto stone in northern Djibouti, are among the most important examples of rock art in the Horn of Africa, a region rich in archaeological heritage and the birthplace ...