A 300-foot-tall anomaly on one of Mars' moons has intrigued observers for years.

KINSHASA (Reuters) - The latest in a series of mystery monoliths to capture the imagination of science-fiction fans around the world met a fiery end in the Democratic Republic of Congo on Wednesday ...

SAN FRANCISCO -- Is it alien or art? Utah public safety officers were stunned when they stumbled on what looks like something out of a sci-fi space film. They found a mysterious-looking, chrome ...

KINSHASA (Reuters) - A roundabout in Democratic Republic of Congo's capital Kinshasa has become the latest site occupied by a mystery monolith after similar objects in the United States and elsewhere ...