Colossal petroglyphs could be ancient boundaries, research suggests

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news about fascinating discoveries, scientific developments and more. Ancient petroglyphs in what is now South America – believed to be among the largest in the world – were intended to mark the boundaries of the areas inhabited by their creators, according to a … Read more

Colossal petroglyphs could be ancient boundaries, research suggests

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news about fascinating discoveries, scientific developments and more. Ancient petroglyphs in what is now South America – believed to be among the largest in the world – were intended to mark the boundaries of the areas inhabited by their creators, according to a … Read more

Venezuela is the first Andean country to lose all its glaciers

For the inhabitants of the Venezuelan state of Mérida, the glaciated peaks of the Sierra Nevada have been a source of pride since time immemorial: the mountains are part of the regional identity and the origin of several legends in the area that link them mythical white eagles. However, none of the six glaciers that … Read more