Far below your feet, nearly 1,800 miles beneath oceans and continents, Earth carries two massive scars from its violent youth. They are so large they rival continents in size, yet no human will ever ...

For decades, scientists have been baffled by two enormous, enigmatic structures buried deep inside Earth with features so vast and unusual that they defy conventional models of planetary evolution.

There are many, many weird things seen on Google Earth. The service, which was launched in 2005, compiles images from various sources, from satellites in geosynchronous orbit that snap low-resolution ...

A strange circular formation just miles from the highly classified Area 51 base has fueled speculations that it could be a ...

The illustration shows a cutaway revealing the interior of early Earth with a hot, melted layer above the boundary between the core and mantle. Scientists think some material from the core leaked into ...