Scientists have tested the two “alien” bodies shown before Mexico’s congress by a self-proclaimed ufologist and have confirmed that they are not fake.

Reports from Mirror UK are that last week, the country’s lawmakers heard testimony suggesting the possibility that extraterrestrials might exist. Now two small skeletons, some two feet high, have been X-rayed by doctors.

Jaime Maussan, who last week presented them to politicians in large wooden coffins, claims that the bodies were found in Peru and are “non-human beings that are not part of our terrestrial evolution”.

Doctors at a laboratory in Mexico City carried out X-rays and CT scans of the bodies. José de Jesús Zalce Benitez, the director of the Health Sciences Research Institute of the Secretary of the Navy, which carried out the tests, said that they showed the bodies had not been assembled or manipulated.

His findings contradicted earlier suggestions that the bodies had been assembled with animal or human bones. “[They] belong to a single skeleton that has not been joined to other pieces,” he said.

Footage of the team carrying out the tests shows one of the bodies bearing an elongated head, a small upturned nose and two slanted eyes.

While they bear a resemblance to fictional depictions of aliens, scientists have yet to suggest that they are from another planet. One hypothesis put forward by academics and archaeologists is that the remains are mummified human bodies.

The Peruvian government has said they are pre-Hispanic objects, with officials there saying that they have begun a criminal probe into how the bodies left the country. Maussan, 70, has said he is innocent and has done "absolutely nothing illegal."

The bodies were first paraded in front of Mexican government officials last week, and a short hearing was held in front of government officials that detailed Maussan's discovery in Peru.

He was accompanied by scientists, who testified under oath to their age and chemical makeup, stating that they're around 1,000 years old — around the time the Inca Empire would have thrived near the ancient mines of modern-day Cusco, Peru, where the bodies were discovered in 2017.

The scientists and Maussan said the genetic makeup of the bodies was 30 per cent different from that of human beings and that they were "not part of our terrestrial evolution."

With just three fingers on their hands and three toes on their feet, they have strong but light bones, no teeth and what the experts suspected was stereoscopic vision like that of a bird. They had retractable necks and a wide head, and they were reportedly discovered with eggs containing embryos inside of them, according to reports from El Pais.

Their makeup included deposits of cadmium and osmium, both rare metals that are used in batteries and telecommunication devices like satellites.

Last week, Maussan told Congress: "Whether they are aliens or not, we don't know, but they were intelligent and they lived with us. They should rewrite history."

Experts remain skeptical, however, of their extraterrestrial nature and have disputed Maussan's findings, claiming that the parading of the bodies was an "unsubstantiated stunt."