An investigator is claiming that a piece of aluminum discovered in 1973 is evidence that aliens have visited earth 250,000 years ago. According to reports, the communist era hid the then discovery from the public and it is only now that the details of the discovery have been released.

As per The Sun, the chunk of metal was tested in a lab in Lausanne, Switzerland recently. Based on the tests, experts concluded that it is made up of 12 metals and of 90% aluminum. What is even more shocking is that the material is highly unlikely made by a technology that is available on earth.

Gheorghe Cohal, the Deputy Director of the Romanian Ufologists Association, told local media: "Lab tests concluded it is an old UFO fragment given that the substances it comprises cannot be combined with technology available on Earth."

As mentioned by Daily Star, humans didn't know about aluminum products until about 200 years ago. In addition, the piece of metal also features a distinctive concave indentation, suggesting that it came from a more complex object. The baffling object which was found buried at least 33 feet under the ground was discovered in 1973 by builders working on the shores of the Mures River.

Aside from the aluminum, there were also other three objects found on the dig. Archeologists who were called to look into it, identified them as very old fossils. Further analysis by experts at the main city of the Romanian region of Transylvania revealed that the objects include two bones are from a large extinct mammal and the other one is a piece resembling a head of an axe.

Meanwhile, Mail said historians are opposing the claims and saying that the object is actually just a part of a WWII German fighter aircraft. The British Journal said that the metal object is currently on display in the History Museum of Cluj-Napoca with alabel that reads: "Origin still unknown."