Ancient Hindu texts describe a global disaster caused by an “unknown weapon, a ray of Iron”.
Some believe the proof of such a catastrophe is what is known as the Libyan Desert Glass, which was formed sometime between 26-28 million years ago.
Fragments of this glass can be found over an area of 10sq kms on the Egypt-Libya border, one stunning piece was also found in Tutankhamen’s brooch.
Many scientists believe the glass was formed by a comet entering the earth’s atmosphere, which heated up the sand beneath to a temperature of 200 degrees Celsius.
But this theory has been disputed.
Engineer Albion W.Hart from Massachusetts Institute of Technology said the chunks of glass left by nuclear tests in Alamogordo, New Mexico, USA, were the same as those found in the Libyan desert.
And it is claimed that there’s no evidence of a gigantic meteorite impact in the Libyan Desert Glass zone and the glass rocks have a grade of transparency and purity (99%) which is not typical in the fusions of fallen meteorites.
A huge area of strange fused silica glass has also been found in the Gobi Desert in Mongolia, including layers at Lop Nor in neighbouring China.
Tests of the radioactive surface indicate the layers of fused silica did not originate from recent detonations, but millions of year before the Chinese become a nuclear power, reports Ancient Pages.
ALAMY ort on Hill O Noth near Rhynie, Aberdeenshire, Scotland, famed for it’s vitrified stone walls
‘The Pelican’ is etched in shallow lines on the desert floor
Melted walls with “glittering blue glass” were reportedly also discovered at a depth of 1800 metres by a Russian archaeologist Piotr Kolzlov in the ruins of the city of Khara Khoto.
He dug up a sarcophagus with two well-preserved bodies of a king and queen.
Local tradition speaks of “lightning bolts crashing down from the heavens and hollowing out this excavation”.
The mystery also extends closer to home.
More than ancient stone hill forts in Scotland have vitrified walls where the stone has melted into glass after being exposed to intense heat for an extended period.
One such fort can be found at Hill O Noth near Rhynie, Aberdeenshire, Scotland, which is famous for its vitrified stone walls.
The latest such area is Dun Mac Sniachan in Argyll, while famous examples can also be found at Benderloch in Oban, Craig Phadraig and Ord Hill, North Kessock, which are both near Inverness.
This week a huge granite casket was discovered buried 16ft beneath the surface about 2,000 years ago in the city of Alexandria, on the Mediterranean coat.