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Stories about lost cities full of riches were prevalent in medieval times and several of them remain to this day.

Sailors, military, fishermen, divers, travelers and oceanographers have reported stories about humanoid creatures that live in oceans, rivers and lakes.

The structure was abandoned more than a thousand years ago without ever being used.

Scientists have come up with 12 hypotheses why we haven't detected signs of alien civilizations yet.

Archaeologists in Mexico City have found another section of 119 skulls that were part of the Aztec capital’s main trophy rack of sacrificed humans.

The earliest known astronomical observatory in the Americas was built by an unknown culture, long before the Incas rose to power in Peru and began to celebrate their Sun God.

A new way of thinking is emerging about how different areas of physics could be connected to create a model that unites traditional scientific thinking with new ideas in quantum physics.

The biohybrid robot is half electronic and half organic, and could be the first step towards something bigger.