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The asteroid's strange orbit may be the work of the gravity of an unknown planet.

So far, no one can explain what these brands are and what their origins.

Without our natural satellite, the planet's climate would be in chaos and life would disappear.

The ancient lost city remained intact, protected by the rainforest.

The document was written by a witness at the time and explains how the immense granite blocks arrived at the monument.

For the first time in 2,000 years, tourists will have access to the ancient city of Hegra in Saudi Arabia.

This is a real danger that we can face if we are not properly protected against space objects that are on a collision course with Earth.

A mysterious orange light show prompted an astronaut aboard the International Space Station to take a photo and share it with Earthlings.