The astronaut Musgrave was unable to explain the huge disk-shaped object he spotted from the window of the Columbia Space Shuttle.
The Phobos Program was a soviet union project to study the planet Mars and its two moons, but what has been found remains a mystery to this day.
Sounds may have played a much bigger role than we imagined in ancient cultures.
On the southern coast of Yonaguni, Japan, there are submerged ruins about 10,000 years old and their origin is still much debated.
The mythology of Ireland's ancient pre-Celtic culture tells the story of a race of kings who "descended from the skies" bringing knowledge and treasures.
The Grand Canyon is one of the most beautiful and famous tourist attractions in the United States, but few know that its history is full of incredible accounts of Giants, Underground Cities and Egyptian and Hindu Temples.
Stories about giants have existed since immemorial times, but we have rarely heard about a two-headed giant, and it is possible that there was one: Kap Dwa.
Giants are mentioned in a multitude of ancient accounts, books and manuscripts and show not only their existence, but the interaction they had with humans.
There are countless legends and oral traditions found in many countries that speak of an underground people who have created a kingdom of harmony, joy and spiritual power.
According to ancient Zulu traditions, the Chitauri were reptilians extraterrestrials beings who had contact with humanity in the past.