After more than a century of digging in Egypt, not one copper tube drill has ever been found.
Yet, the sarcophagus inside the Great Pyramid bears marks that look cut by a round rotating tool.
By the end of this history’s YT video, you will know what really made those marks.
You will see what the best experiments have proven, and you will learn why the claim of a drilling machine buried under Giza falls apart.
But the truth is stranger than the rumor.
And it starts with one granite box carved from a single block.
Here is the mystery that videos like this one never explain.
A story is spreading that archaeologists found the machine used to drill Egypt’s granite hidden beneath Giza.
We searched for any report, any excavation record, and any museum announcement and found nothing.
No machine of any kind has been announced.
So why does the story feel so believable?
Because the stone itself is real, the holes are real, and the missing tools are a genuine puzzle that experts have argued about for generations.
Begin with the granite.
The king’s chamber inside the Great Pyramid holds a red granite sarcophagus with no lid carved from a single block.
That granite came from the quaries at a swan, more than 800 km up the Nile from Giza.
Granite is one of the hardest common rocks with a hardness between six and seven on the scale geologists use.
Copper, the main metal of that age, sits near three.
So, how do you cut a harder material with a softer tool?
The answer sounds impossible, and it hides a trick.
First, look at the marks themselves.
Researchers studying the sarcophagus have reported core marks and peg holes along its surfaces.
A core mark is the scar left when a hollow tube spins into stone and leaves a plug of rock behind.
The scars show curved edges and thin circular grooves.
They point to a rotating tube, not a chisel.
But the scars alone do not tell you what powered that tube.
And the answer took two centuries of debate to approach.
Archaeology has plenty of these cores.
A granite core from Giza dates to the fourth dynasty, the age of the great pyramids.
A stone bowl from the step pyramid at Sakara shows a slot where a cing tool was used.
That bowl is older still from the third dynasty.
Core holes also appear on the famous statue of King Kafra.
A double cord bassalt tube is another oddity.
And cores found across Egypt range from about 6 millm up to possibly 70 cm wide.
So the evidence for tube drilling is not a rumor.
It is sitting in museums right now.
Here is the part that fuels the rumors.
No copper tube from a granite drill has ever been recovered from Egypt, from Mesopotamia, or from Cree.
Not one barrel and not one wooden shaft built to turn it.
Skeptics of the standard story seize on this gap and call it proof of a lost machine.
Defenders reply that old copper was melted down and reused because metal was precious.
And that argument leads to a famous scholar who studied the cores up close.
In the 1880s, the English archaeologist Flender Petri surveyed the Giza plateau and measured nearly everything on it.
He examined drilled granite and studied the cores.
Petri noticed fine spiral grooves winding around some of the cores, and he judged the cutting too fast and too clean for simple sand.
He proposed that the Egyptians used hard jewel points set into their tools.
That idea has attracted attention for well over a century.
But a chemist soon challenged it with a much simpler explanation.
Alfred Lucas, a chemist who worked on Egyptian materials, argued that quartz sand did the real cutting.
His reasoning was practical.
Quartz is about as hard as granite and almost impossible to run out of in a desert.
Poured under a spinning copper tube, the grains bite into the rock while the soft metal merely carries them around.
Petri doubted this and the two views stayed locked in tension for decades.
Then a laboratory test in 1983 made the puzzle even more tangled.
Researchers at the Penn Museum, including John Gwynette and Leonard Gorlick, took a silicone mold of a hole in an Egyptian sarcophagus.
Under a scanning electron microscope, they studied the fine lines inside it.
The spacing of those lines grew narrower as the hole deepened, which they linked to.
Abrasive grains growing finer during the work.
Then they tried to recreate the lines with different materials.
The results surprised everyone who expected a simple answer.
Quartz sand did not reproduce the concentric lines.
Dry emey failed as well.
Emery mixed into a thick slurry with olive oil did reproduce them and it cut faster than emery mixed with water.
Diamond left the lines even when dry and corandum left them when it was wet.
The team admitted it could not say which abrasive the Egyptians used.
But it challenged the claim that diamonds were impossible and that left a huge open loop.
That is where the debate would have ended if not for a stonemason named Dennis Stocks.
He did not argue about the marks.
He tried to make them.
Working in Egypt, Starks built a bow drill and set out to core a block of a swan granite using nothing but ancient methods.
His results are the best answer we have, and they show how a small crew could do something that looks impossible.
His copper tube measured 8 cm wide and about 1 millm thick.
Three workers ran the drill with two pulling a bow back and forth and one pressing down on the top.
The bow spun the tube at roughly 120 turns a minute.
The crew needed about 1 kilogram of pressure on every square centimeter of the bit just to start cutting.
So the tool was nothing more than muscle, copper, and sand.
And the speed of the cut tells the real story.
After 20 hours of work, the team had cut a granite core 6 cm wide.
The rate was about 5 cubic centimeters of stone removed per hour.
Stocks used dry quartz sand, and he found that wet sand made the cutting harder, not easier.
He also believed an experienced crew could double the speed.
That sounds painfully slow, but it matters for a reason you may not expect.
And that reason is hidden in the soft copper itself.
Think about how little we would know without that kind of hands-on testing.
For decades, the debate ran on opinion with each side defending a favorite abrasive.
Then a mason with a bow, a copper tube, and a block of awan granite produced numbers that anyone could check.
20 hours, 6 cm, and 5 cm an hour are small figures, but they are real.
They turned a guess into a measurement.
That is how real archaeology moves forward and it is far more reliable than a thumbnail with a glowing machine.
But the copper tube itself still hides the real surprise.
In granite, the copper wore away fast.
Stocks reported that metal loss was significant, which means the tubes were consumed like drill bits today.
In soft limestone, by contrast, the same method cut about 15 times faster and wore the copper far less.
This helps explain why granite drilling stayed rare and was reserved for royal objects.
It also gives you a clue about the missing tools.
A worn out copper tube is no use to anyone, so the Egyptians had every reason to melt it down.
Now, the tomb paintings add another layer.
The oldest picture of a bow drill appears in the fifth dynasty tomb of Thai at Sakara.
Later tombs at Thieves, dated around 1450 BC, show carpenters and bead makers using the same tool.
Other tomb scenes show craftsmen making stone vases with a boring tool.
These paintings do not show a copper cing barrel cutting granite, and honest researchers admit that, but they prove the Egyptians owned a spinning tool with a bow, and that fits the experiment.
If you are enjoying this investigation, take a second to like this video.
It helps history’s YT keep digging into the real evidence behind viral claims.
And the next section shows where the machine rumor probably began.
In March 2025, two Italian researchers, Filipo Bondi and Curado Malanga, held a press conference about Giza.
They called their work the Cafre Project and used pulse radar technology.
They claimed that a vast underground city lies beneath the pyramids reaching more than 6,500 ft across, which is about 2,000 m.
They also described eight vertical structures that extended more than 2,00 ft down.
The internet exploded within hours and a lot of headlines followed.
They went further and said unidentified structures might sit at depths of 4,000 ft or roughly 2 to 100 meters.
Imagine a hidden complex deeper than most skyscrapers are tall.
It was a spectacular claim and it spread across social media in a matter of days.
Many videos soon blended it with older stories about lost technology.
That is how a radar press conference turned into a rumor about a buried drilling machine.
But the experts who examined the claim saw a very different picture.
Lawrence Conurs, a ground penetrating radar researcher at the University of Denver, called the underground city a huge exaggeration.
He said the technology cannot reach that deep and that any real finding would probably be small.
Zahi Hawas, Egypt’s most famous archaeologist, rejected the claim as having no scientific basis.
He added that Egypt’s antiquities authorities had not authorized any work around the pyramid of Kafri.
Another former minister, Mdu Alamati, called the claims utterly baseless.
Yet, the story had one more problem.
No peer-reviewed paper accompanied the announcement, and the claims were presented at a press conference.
Egyptologist Hussein Abdasir said the study did not meet proper scientific standards.
In science, a claim that cannot be checked by others is only a claim.
That is why the underground city has not changed the textbooks and why it has nothing to do with granite drilling.
The only thing it produced was a wave of headlines.
So, where did the rumor of a machine come from?
Some of it comes from a real puzzle.
Granite cores and drilled holes are found all over Egypt, and many look surprisingly smooth.
Photos of these objects spread online without context, and viewers assume that only a modern machine could make them.
Add the missing tools, and the machine story feels natural.
But a missing tool is not the same as a hidden machine.
Archaeologists have found countless ancient workshops, but metal tools almost never survive, and that fact changes the picture.
Metal was valuable in the ancient world, and broken tools were collected and melted.
A copper tube that wore thin was more useful as scrap than as a relic.
By contrast, stone survives for thousands of years, so the cores, bowls, and sarcophagi remain.
That imbalance explains why the products of ancient craft are everywhere, and the tools are almost nowhere.
Many ancient trades share this problem.
And Egypt has a second clue about its workshops that people rarely mention.
Look at the unfinished objects.
An unfinished travertine vessel was found with part of its core still attached, which freezes the work in midstep.
A stone bowl from the step pyramid shows the slot where the cing tube stopped.
These pieces were abandoned halfway.
So they record the process itself.
Slot widths suggest a tube wall about 1 to 5 mm thick.
A measurement reported by the German scholar deer Arnold in 1991.
Every one of these details points to a handdriven method and none points to an engine.
Of course, honest research has limits and you should hear them.
Stocks drilled a core 6 centimeters wide, but some ancient cores may reach far larger sizes.
Nobody has recreated the biggest ones using ancient methods.
The Pen Museum study showed that quartz sand failed to reproduce certain fine lines.
Those gaps are real, and critics who point to them deserve a fair hearing.
But a gap in the evidence is not evidence of a machine.
And there’s a deeper reason to doubt the machine story.
Think about what a powered machine would require.
It would need fuel or a motor, bearings, a frame, and a steady supply of shaped metal parts.
Those parts would leave traces such as worn gears, spare components, and workshop debris.
No excavation at Giza, Oswan, or any other site has produced such a thing.
Meanwhile, workers villages near Giza have yielded bakeries, breweries, and tools of a very different kind.
So, the archaeology tells a consistent and human story.
Yet, the most interesting evidence is still ahead.
The workers town near the pyramids uncovered over the last few decades shows how organized this labor was.
Archaeologists found bakeries, storehouses, and sleeping quarters for thousands of people.
They found evidence of meat, bread, and beer in large quantities.
These were skilled and well-fed crews, and the pyramid builders were not the slaves of old movies.
That detail matters here because drilling granite by hand needed trained teams.
A well-run workforce could do slow work for years.
And the sarcophagus shows how much time that work might have taken.
Even moving the stone shows how organized these crews were.
A diary found at Wadiol.
Jarf on the Red Sea coast records a fourth dynasty work crew led by an official named Mirror.
It describes boats carrying limestone blocks to Giza during the building of the Great Pyramid.
The writing is a plain log book with days, destinations, and cargo.
It reads like the paperwork of a well-run project, not like a story of mystery technology.
Granite from Oswan traveled north by river 2.
That long trip raises one more question.
Return to the Great Pyramids granite box.
Stock’s experiment suggests that cing even a modest hole in granite takes many hours.
A box of this size needs a lot more than a single hole.
The Egyptians did not just drill it.
They shaped the block, hollowed the woohoo inside, and smoothed every face.
Estimates of that labor are uncertain, but they run to many months or longer for a skilled crew.
Patience, not magic, is the best explanation.
And that conclusion has a surprising consequence.
If drilling was slow, it was also a luxury.
Only the richest rulers could afford to spend this much labor on a single object.
That is why granite sarcophagy, statues, and vessels appear mainly in royal or temple settings.
Any cost of the work was itself a statement of power.
In other words, the slow method may have been part of the point.
A king who could order a granite box and wait for it was showing his reach.
But the story of how the Egyptians cut granite is bigger than drilling.
Egyptians also split, pounded, and shaped granite in other ways.
At Aswan, the unfinished obelisk still lies in the quarry, covered with pounding marks.
Workers used balls of a harder stone called dolerite to pound away at the granite, and the marks of that labor are everywhere.
That unfinished monument cracked and was abandoned, which tells you the process was risky and difficult.
It sits there today as a record of failure, and it shows the real limit of ancient technology.
Dolorite pounders were found in large numbers.
They are tough, round, fist-sized stones, and the quarry floor still holds them.
Workers struck the granite again and again, crushing the surface grain by grain.
It was brutal work, and it cost enormous amounts of time.
Nobody who did it needed a motor, only stamina and a plan.
So, the Egyptians had a method for splitting stone and a method for drilling it, and both depended on sheer human effort.
But one more claim deserves a closer look.
Some popular videos insist that the Egyptians could not have worked granite without high-tech diamond tools.
The reply from researchers is that the experiments show otherwise.
Bow drills, copper tubes, sand, and patient hands can produce the same marks, at least in many cases.
The experiments do not prove that every object was made this way.
They do show that nothing demands a lost technology.
When a simple explanation fits the evidence, researchers prefer it.
Yet, that does not erase the real questions.
Here are the questions that remain open.
What abrasive did the Egyptians use at different times and places?
How did they cut the largest cores, some possibly up to ice, 70 cm across?
Why do the grooves on some cores look so regular?
Each question can be tested with new experiments and new microscopes.
The Pen Museum study showed what careful lab work can reveal.
Another round of tests with modern tools could narrow the answers a lot further.
Notice the pattern in this story.
Every time the mystery seems to demand a lost machine, a careful experiment brings it back to human hands.
The rumor of a buried drilling machine fits the pattern perfectly.
It takes a real puzzle, the missing tools, and turns it into a fantasy.
The truth is less dramatic, but it is also more impressive.
A crew of workers pushed and pulled a bow for days to cut a stone that still tests modern craftsmen.
That deserves respect.
So, what would it take to prove the machine story?
It would need an excavation report with a date and a location.
It would need a real object photographed in place and examined by independent experts.
It would need a lab analysis of the metal, the wear, patterns, and the layer of earth it lay in.
We found none of these things.
Until they appear, the claim stays where it started, which is on a screen with no source.
And that brings the whole investigation back to one rule.
Ask where a claim comes from before you ask what it means.
If a video says archaeologists found a machine, look for the archaeologists names.
Look for the site, the season, the report, and the museum that holds the object.
If none of those exist, the claim has no foundation.
However dramatic the thumbnail looks, this habit will protect you from most viral history stories.
It also makes the real discoveries more exciting because you can see how much work stands behind them.
What stands behind the real evidence is impressive.
A granite core from Giza sits in a museum today.
A bowl from the step pyramid still shows the slot where a tube once spun.
Tomb paintings show bow drills at work.
And an experiment at Aswan reproduced the process with copper, sand, and muscle.
The Great Pyramid’s sarcophagus carries the marks of that labor.
None of this requires a hidden engine, and all of it is open to anyone who wants to study it.
The deeper wonder is the people.
They had no steel, no electricity, and no engines.
They had a soft metal, desert sand, and a bow made of wood and cord.
With those, they carved the hardest stone in their country into boxes, statues, and vessels that still gleam after 4,000 years.
They solved problems that would defeat many modern workers using ancient tools.
That is the real secret of Giza, and it is better than any machine buried in the sand.
Still, the search continues.
Researchers keep studying drilled stone with electron microscopes and new imaging tools.
Each year, new objects come out of museum store rooms, and new marks are measured.
One day, a worn copper tube may finally turn up in a workshop layer and settle the debate.
That discovery would be real, and it would be documented.
Until then, the best evidence is the stone itself and the careful experiments that have learned to read it.
So, the machine remains a myth, but the mystery of the method is far from finished.
The next time you see a headline about a lost machine buried beneath the pyramids, you will know how to read it.
Look for the source, the site, and the experts who agree and disagree.
The real story of granite at Giza is a story of copper, sand, patience, and enormous human labor.
It is less glamorous than a buried engine, but it is true and it can be tested.
The missing tools are a puzzle worth solving.
Suppose the real answer to how Egypt cut granite is human hands and endless patience.
Does that make the ancient builders seem less mysterious to you or even more astonishing?
