These ancient structures still stand - but the people who built them remain a mystery that history can’t fully explain.

Here’s what scientists know about the life form and why it could change their understanding of desert ecosystems.

Deep-sea sediment layers show rare microbial wrinkle structures that formed in environments far beyond the reach of sunlight. Dr. Rowan Martindale, a paleoecologist and geobiologist at the University ...

During the season eight premiere episode of "The UnXplained" host William Shatner takes viewers all over the world to examine ancient structures.

Archaeologists have identified hundreds of ancient structures hidden beneath the dense canopy of Ecuador's Andean Chocó ...

Whether they're sites of worship, popular tourist attractions or luxury apartments, there are plenty of historic landmarks still flourishing today. Read on to see the world's oldest man-made ...

Researchers of ancient Egypt discovered “five identical structures near the Khafre Pyramid’s base, linked by pathways, and eight deep vertical wells descending 648 meters underground.” Claims that ...

Archaeologists mapping the well-preserved Maya settlement of X’baatún found dozens of ruined structures dating back over 800 years. Photo from Xavier Sicart Chavarría via INAH Hidden beneath the ...

A massive archaeological discovery in County Wicklow suggests that ancient Irish people lived in dense urban prehistoric ...

Across India, ancient architecture continues to offer clues about early engineering, metallurgy, and scientific thought.