Secret History
Experts said they were mystified by the "unique" find on the site of a housing development in Monmouth.
Monmouth Archaeology, which found the wooden foundations, said they dated to at least the Bronze Age, but could be early Neolithic, about 6,500 years old.
It said the pyramids were built about 4,500 years ago.
Steve Clarke of Monmouth Archaeology, who has 55 years' experience, claimed nothing like it had been discovered in Britain before and he was checking if something similar had been unearthed on mainland Europe.
He said the structure, possibly a long house, had been built on the edge of a long-lost lake, which has silted up over time.
The building's foundations were made from entire tree trunks, measuring about a metre wide.
Evidence of the meteorite's intense heat was found on two continents. The researchers believe the huge cosmic impact triggered a vicious cold snap, which caused widespread destruction.
The international team found a substance known as melt glass, which forms at temperatures of 1,7000 to 2,200 degrees Celcius and can result from a 'cosmic body' hitting the earth.
Antonio Lombatti said the false shrouds circulated in the Middle Ages, but most of them were later destroyed.
He said the Turin Shroud itself - showing an image of a bearded man and venerated for centuries as Christ's burial cloth - appears to have originated in Turkey some 1,300 years after the Crucifixion.

The Turin Shroud was believed to have covered Jesus, but a leading Church historian says it is one of many produced over a thousand years after his death.
'Most of them were destroyed during the French Revolution. Some had images, others had blood-like stains, and others were completely white.'
The Turin Shroud is a linen cloth, about 14ft by 4ft, bearing a front and back view of the image of a bearded, naked man who appears to have been stabbed or tortured. Ever since the detail on the cloth was revealed by negative photography in the late 19th century it has attracted thousands of pilgrims to the Cathedral of St John the Baptist in Turin.
The ancient graveyard, dating back to the 4th or 5th century B.C.E, was brought to light by archaeologists who have established ongoing excavations in the ancient port of Marseille. At present, they have already located six sarcophagi and urns.
"These findings in this specific area are totally unexpected," said Lionel Guévalet, director of the Provence de la société Bouygues Immobilier and added that this was a very important discovery because "it could dispute everything we know about the Marseille habitants of Greek origin."
According to the French archaeologists, this excavation will provide us with new information about the life of Greeks of Marseille, as well as about the exact position of the cemeteries, which were traditionally located outside the city.
Marseille was a Greek colony founded by the residents of Phocaea in 600 B.C.E.

Chinese archaeologists at work in the extended excavation of the Pit One of the Terracotta Warriors and Horses Museum in Xian, using delicate equipment to help preserve the detailed work in their original production more than 2,000 years ago, of the latest terracotta warrior find in Xian, China's Shaanxi province.

Painstaking: Archaeologists at work in the extended excavation of the Pit One of the Terracotta Warriors and Horses Museum in Xian, China where they are measuring and recording the dimensions of the latest terracotta warrior find
"For the first time, we have found a painted, cortex shield on a chariot, which is the first of its kind to be discovered in any of the three pits," said Cao Wei, curator of the Museum of the Terracotta Warriors and Horses of Qin Shi Huang.
Shields used by soldiers in the Qin Dynasty (221-206 BC) were 60 cm long and 40 cm wide, with red, green and white geometric patterns.
"The shield was partly broken, and it's believed it was the type used by a high-ranking official, as it's larger and had colorful patterns," said Zhang Weixing, a researcher on the archaeology team.
Scientists and engineers estimate that it would have required 10,000 men 1,000 years to develop the extensive operations carried on throughout the region. It is estimated that 1.5 billion pounds of copper were mined by these unknown people.
The pure copper of Lake Superior has been discovered in prehistoric cultures throughout North and South America.
The mystery of their origin remains unsolved. The mystery of their disappearance remains unsolved.
Many hammered copper knives, arrow and spear heads and axes were recovered at ancient mining sites. Some fine examples are on display at Fort Wilkins.
In 1842, the Chippewa ceded all claims to 30,000 square miles of the Upper Peninsula to the United States Government. The Copper Rush was on. In 1843, before the western gold rush of the '49ers, thousands came to the Copper Country to try their luck.
The first mining rush came to Copper Harbor. All travel was by boat, there were no roads. Copper Harbor became a bustling sea town.

Because we're used to the metric system, which defines units of volume based on the cube, modern archaeologists believed that the merchants of antiquity could only approximately assess the capacity of these round jugs.
Now an interdisciplinary collaboration between Prof. Benenson and Prof. Israel Finkelstein of TAU's Department of Archaeology and Ancient Near Eastern Cultures has revealed that, far from relying on approximations, merchants would have had precise measurements of their wares - and therefore known exactly what to charge their clients.
The researchers discovered that the ancients devised convenient mathematical systems in order to determine the volume of each jug. They theorize that the original owners and users of the jugs measured their contents through a system that linked units of length to units of volume, possibly by using a string to measure the circumference of the spherical container to determine the precise quantity of liquid within.
The system, which the researchers believe was developed by the ancient Egyptians and used in the Eastern Mediterranean from about 1,500 to 700 BCE, was recently reported in the journal PLoS ONE. Its discovery was part of the Reconstruction of Ancient Israel project supported by the European Union.
Reporting in the June issue of Antiquity, archaeologist Marc Azéma of the University of Toulouse - Le Mirail in France and independent French artist Florent Rivère, argued that by about 30,000 years ago Paleolithic artists used "animation effects" in their paintings. To render the movement, they deconstructed it in successive images.
According to the researchers, this would explain multiple heads or limbs on some cave paintings.
"Prehistoric man foreshadowed one of the fundamental characteristics of visual perception, retinal persistence," Azéma and Rivère wrote.
Azéma, who spent 20 years researching Stone Age animation techniques, isolated 53 figures in 12 French caves which superimpose two or more images to represent trot or gallop, head tossing and tail shaking.
"Lascaux is the cave with the greatest number of cases of split-action movement by superimposition of successive images. Some 20 animals, principally horses, have the head, legs or tail multiplied," Azéma said.
When the paintings are viewed by flickering torchlight, the animated effect "achieves its full impact," said Azéma.
"That such animation was intentional is endorsed by the likely use of incised disks as thaumatropes," he added.
The Antikythera mechanism was lost to the world for centuries. The device was salvaged in 1900 from a ship that sank en route to Rome, in the 1st century BC, between Crete and the island of Antikythera in the Mediterranean. When one of the fragments was discovered to contain a bronze gear wheel, the idea that this was some kind of astronomical clock was dismissed as too fantastic an anachronism. It was not until 1951 that the investigation was picked up by a British science historian Derek J. de Solla Price. So far 82 fragments have been recovered of what is now considered the oldest known astronomical computer.
The device is made of bronze and contains 30 gears though it may have had as many as 72 originally. Each gear was meticulously hand cut with between 15 and 223 triangular teeth, which were the key to discovering the mechanism's various functions. It was based on theories of astronomy and mathematics developed by Greek astronomers who may have drawn from earlier Babylonian astronomical theories and its construction could be attributed to the astronomer Hipparchus or, more likely, Archimedes the famous Greek mathematician, physicist, engineer, inventor and astronomer. Why it was built, or for whom is unknown.
Comment: Interestingly, Cassiopaean Experiment has references to the origin of this mining.
Session 20 August 2001
Q: What group mined the copper in northern Wisconsin, Minnesota, and Michigan, like in Isle Royale?
A: Aryans.
Q: What did they want the copper for?
A: Weapons.
Q: Wouldn't iron make better weapons?
A: Not in 4th density.