Complex underground tunnels were discovered in Brazil, the question is who dug them?

The idea for a trans-Atlantic tunnel has been around for more than a century, but no fully-formed plans currently exist.

Use precise geolocation data and actively scan device characteristics for identification. This is done to store and access ...

Visitors can delve into the mysterious and narrow passages of the fogou, a hidden world nestled within a type of settlement ...

“Familiar” black holes, if you can call them that, typically form in the wake of dying stars that collapse inwards.

The underground passages and caves are unique to this part of the UK but are still a mystery to archaeologists and ...