For years, Egyptologists have hotly debated how the massive pyramids of ancient Egypt were built more than 4,000 years ago. Now, a team of engineers and geologists brings a new theory to the table — a ...

The Kukulkán pyramid in Chichén Itzá is scanned in a detailed search for hidden chambers, making sure not to damage the Mayan ...

The pyramids may have been built using a sophisticated hydraulic system, according to a new study in Egypt. Evidence of ancient Egyptians using water pressure to lift stone blocks was discovered at ...

Many pyramids were known to have capstones at their peak, also known as pyramidions, which were made of limestone, sandstone, basalt or granite. Some may have been covered with plates of copper, gold ...

More than 3,000 years ago, a series of stone pyramids were constructed in the heart of Mexico. Now, thanks to recent archaeological excavations, researchers have revealed they were used by indigenous ...

High in the Tobacco Root Mountains of Montana, a wall of stone rises from the forest floor in clean, geometric tiers that ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. For years ...