Grand Canyon.
There there’s been these crazy stories of people finding these like Egyptian these caverns with like Egyptian artwork and hieroglyphics.
The Grand Canyon stretches 277 miles across the American Southwest.
A gash in the earth so vast that it can be seen from the outer edge of the atmosphere.
Its walls are striped with color, deep red, pale gold, burnt orange, and the near black of billion-year-old basement rock.
Scientists call it the basement of history.
The geological record exposed in those walls spans nearly 2 billion years of planetary time, nearly half the age of the Earth itself.
For centuries, people have stood at the rim and felt the particular vertigo that comes not just from the depth, but from the time.
Every colored band is a chapter.
Every layer, a world that no human eye ever saw.
Recently, a group of researchers took a closer look.
What they found will change our understanding of this place and raise questions about what else may still be waiting in the rock.
This is what the Grand Canyon is hiding.
Weird prehistoric life forms found in the Grand Canyon.
It began with a rock falling.
In 2020, geologist Alan Krill was leading a student hiking group along the Bright Angel Trail inside Grand Canyon National Park when a massive boulder tumbled from a cliff face and split on the trail.
What had been sealed inside that rock for hundreds of millions of years was suddenly, briefly, visible to the light of day.
Krill had sharp eyes.
The exposed surface of the rock showed what appeared to be fossil markings, faint, organized, deliberate, not the shapes of plants or shells, but tracks.
He photographed them and sent the images to his longtime colleague, Dr.
Steven Roland, a paleontologist at the University of Nevada, Las Vegas, who is best known for his excavation work at the Wauo Hunting Ground, a 200-year-old butchering site discovered in Carson City, Nevada.
Roland’s analysis was striking.
The prints, he concluded, were approximately 313 million years old, making them not just the oldest animal tracks ever found in the Grand Canyon, but potentially the oldest evidence of vertebrate animals walking on sand dunes anywhere on Earth.
The rock itself came from the Manaccha Formation, a sandstone layer approximately 314 million years old.
And the sand, fine grained and preserved perfectly, had done its job with extraordinary fidelity.
What Roland identified in those tracks were the signatures of not one but two separate reptilian animals crossing diagonally over the boulder’s surface.
One of the animals appeared to be about a foot in length.
Its movement showed a lateral sequence gate.
A specific walking pattern in which the left rear foot moves in succession with the left front foot followed by the right rear and then the right front.
That type of gate is characteristic of amnotes animals that lay hardshelled eggs a group that includes all reptiles, birds and mammals.
The significance of that detail is hard to overstate.
Amnotes represent a key evolutionary development in vertebrate life.
The adaptation that allowed land dwelling animals to reproduce away from standing water for the first time.
Finding evidence of amnotes walking on sand dunes of this age pushed the confirmed timeline of that evolutionary development back by at least 8 million years beyond what had previously been documented.
Not everyone was immediately convinced.
Mark Neble, a paleontology program manager at the Grand Canyon, noted publicly that there is genuine disagreement within the scientific community about how to interpret ancient tracks and how to precisely date the rock layers they appear in.
That honest caveat is important.
These are difficult determinations and the fossil record of tracks requires careful analysis to distinguish actual animal prints from natural surface patterns in sedimentary rock.
What is beyond dispute is the find itself.
The rock was in plain sight on a trail that thousands of people had walked.
Every one of them had passed right by it.
Grand Canyon caves with sloth dung and mummified bats.
Most visitors to the Grand Canyon have no idea that the cliffs surrounding them are riddled with caves.
These are not small crevices or decorative hollows.
Some are narrow enough to require hands and knees.
Others open into rooms large enough to stand in, turn around in, and feel temporarily shielded from the exposure of the open canyon.
Inside these caves, preserved by one of the driest climates in North America, scientists have found something extraordinary.
Intact biological records from the ice age.
Rampart cave discovered in 1936 at the far western end of the canyon at an elevation of approximately 534 m became one of the most scientifically significant archaeological finds of the 20th century.
The cave floor was covered in enormous spherical dung deposits, mounded and darkened, looking almost as though they had been deposited recently.
Radiocarbon dating told a very different story.
The dung was between 11,000 and 40,000 years old, and it had not been made by any animal still alive in the canyon.
It had been made by Shasta ground sloths, massive slowm moving mammals standing roughly 9 ft tall and weighing close to 500 lb.
These animals had been extinct for over 10,000 years.
Victims of the same megaponal collapse that ended the mammoth, the American horse, and dozens of other large North American species.
The cause of that collapse is itself a subject of ongoing scientific debate.
Climate change, over hunting by early human populations, or most likely some combination of both.
The plant matter preserved in the sloth dung allowed researchers to reconstruct what the ancient landscape around the canyon looked like tens of thousands of years ago.
Among the plants detected, globe malow, Mormon tea, salt bush, catclaw acacia, cane reeds, and yaka.
These weren’t species the sloths ate in captivity or in a controlled setting.
They were the exact plants growing on this actual landscape during the plea to scene recorded in the stomach contents of an animal that was walking here when humans were still newcomers to the continent.
The cave also yielded the skulls of Harrington’s mountain goats, a species first formally described by paleontologist Chester Stock in the 1930s, who estimated the animals had existed in the region for at least 19,000 years before disappearing alongside the sloths.
Harrington’s goat was smaller than modern mountain goats with shorter hair and a different horn configuration.
And its fossils have helped scientists understand how the canyon’s megapona community was organized during the ice age.
Perhaps the most unusual finds were the mummified condors.
Dr.
Steven Emley, a biology professor at the University of North Carolina, Wilmington, and an expert in ancient bird populations, examined condor specimens from these caves whose tissue had been so effectively preserved that skin and soft tissue details remained intact on certain bones.
Chemical analysis of those tissue samples revealed that the ancient Grand Canyon condors had fed primarily on megapa, the same giant mammals that were about to go extinct.
When the mammoths and sloths disappeared, the condors lost their primary food source, and they nearly disappeared, too.
The California condor that exists today is a remnant of a species that came very close to following its prey into extinction.
The Colorado River is almost dry.
The Colorado River is the reason the Grand Canyon exists.
Over the past 6 million years, this river has carved one mile straight down through the Colorado Plateau, exposing rock layers that span nearly 2 billion years of Earth’s geological history.
The river is not just a scenic feature of the canyon.
It is the canyon’s author, its ongoing cause, and in a very real sense, the continuation of its story.
And it is running out.
The Colorado River originates in the Rocky Mountains and travels approximately 1,450 m before reaching the Gulf of California.
Along the way, it crosses some of the most arid terrain in North America, supplying water to more than 40 million people across seven American states and two Mexican states.
A figure that has grown dramatically as cities like Las Vegas, Phoenix, Los Angeles, San Diego, and Tucson expanded through the latter half of the 20th century.
The problem that environmentalists began warning about in the 1990s has now become undeniable.
Lake me, the reservoir created by Hoover Dam and the largest reservoir in the United States by water capacity, reached its lowest recorded level since the dam’s completion in 1936 during the drought years of the early 2020s.
The bathtub ring, a pale white mineral stain visible on the canyon walls around the lake’s perimeter, showed at certain points that the water level had dropped by more than 180 ft below its historical maximum.
The ring became an unavoidable visual record of what was happening to the system.
Lake Powell, the second major reservoir created by the Glen Canyon Dam, a structure completed in 1966 and controversial from the moment of its construction, faced similar conditions.
In 2022 and 2023, Lake Powell fell to levels so low that the dam’s hydroelectric generating capacity was significantly reduced.
The concern raised by engineers is not abstract.
If the reservoir falls below what is called minimum power pool elevation, water can no longer reach the generating turbines.
If it falls further to dead pool elevation, water cannot pass through the dam at all.
The Colorado River in that scenario would effectively stop flowing below the dam.
Uranium deposits found in the Grand Canyon.
The Grand Canyon is a spiritual and cultural homeland to at least 11 Native American tribes.
For thousands of years, it has been a place of ceremony, sustenance, and identity.
You would expect with that history and with its status as one of the most visited national parks on Earth that it would be protected from industrial contamination.
The reality is more complicated.
Uranium deposits exist throughout the Colorado Plateau, concentrated in geological formations known as Brecha pipes, cylindrical columns of collapsed rock filled with minerals, including uranium ore.
The Canyon region first attracted miners in the 1870s.
And the history of uranium mining near Grand Canyon National Park dates to the 1950s when the orphan mine began operating just 2 miles from Grand Canyon Village.
Workers at the orphan mine were not informed of the radiation risks at the time, and some later developed health problems related to radon gas exposure, a health and safety failure that became part of a broader national reckoning with uranium mining practices.
By the mid 2000s, rising uranium prices triggered a new wave of exploration around the canyon.
By the end of that decade, thousands of mining claims had been filed on public lands surrounding the park.
One of those claims became the Canyon Mine, later renamed the Pinon Plain Mine, which is currently described as the highest grade uranium deposit under active development in the United States.
The Havasupai tribe, whose reservation lies at the bottom of the canyon and whose survival depends on the spring-fed Havasu Creek flowing through their village, have been among the most vocal opponents of the mining.
Their water comes from underground aquafers that could be contaminated if mining operations breach into the subsurface water system.
For a community that has lived in the canyon for thousands of years and whose very existence depends on that spring, the threat is not theoretical.
In 2012, the federal government established a 20-year ban on new uranium mining claims on approximately 1 million acres of public land surrounding Grand Canyon National Park.
But existing claims, including the Pinon Plain Mine, were grandfathered in.
As of 2022, nearly 600 mining claims remained active on national forests and other public lands adjacent to the park, despite repeated congressional attempts to make the mining ban permanent.
Those attempts have not succeeded.
The tension between resource extraction and conservation is not new in the American West.
But the Grand Canyon represents a case where the stakes, cultural, ecological, and historical, are as high as they get.
The Molon Monster.
Not every discovery in the Grand Canyon fits neatly into a scientific category.
Arizona has its own version of Bigfoot.
It is called the Mogulon Monster, named for the Mogulon Rim.
A 2,000 ft escarpment stretching across northern Arizona from Yavapai County to the New Mexico border, defining the edge of the Colorado Plateau and the beginning of the lower desert country.
The dense ponderosa pine forest along this rim has been the setting for reported encounters with a large hairy bipeedal creature for over a century.
The first documented sighting near the Grand Canyon dates to 1903 when an explorer named IW Stevens reported encountering a massive haircovered humanoid creature near the canyon’s edge.
His description, a large ape-like being with immense strength, unusual agility, and the ability to move silently through rugged terrain, established the template for virtually every report that followed.
The accounts have continued across the decades.
Don Davis, a cryptozoolology enthusiast, claimed to have encountered the creature during a boy scout trip near PAC, Arizona in the mid 1940s, describing it as having expressionless eyes and a square shaped face.
According to a consistent thread through the anecdotal record, the Moon monster stands over 7 feet tall, has claws at least 2 in long, is covered in shaggy hair, and emits an odor described as similar to rotting fish or decaying meat.
Some reports mention a piercing scream described variously as the sound of a woman in distress or a sound unlike any known wildlife in the region.
Scientists who have looked at the reports tend toward two explanations.
Either the sightings are cases of misidentification, most commonly large standing black bears, which can appear startlingly humanoid when upright, or they are exaggerated accounts embellished by folklore and retelling.
The range of the Moon monster corresponds closely to the range of the American black bear in Arizona, and bears are known to stand on their hind legs when curious or alarmed.
No physical evidence has ever been recovered that would require a different explanation.
But the Moon monster stories have persisted for 120 years, crossing generations and geographic locations, and the canyon country remains wild enough that the accounts carry a certain weight simply from the terrain they come from.
This is not suburban Arizona.
This is one of the most rugged and remote landscapes in North America.
Ancient microbial mats in the canyon’s depth.
Not all of the Grand Canyon’s most significant discoveries are dramatic in the way visible fossils or mysterious creatures are.
Some are far smaller than the eye can easily see and far more consequential for our understanding of life’s history.
In recent years, researchers have documented living microbial mat communities in several of the canyon’s springfed environments.
These communities, thin layers of bacteria, archa, and other microorganisms living together in structured colonies, represent some of the oldest forms of life on Earth.
Microbial mats of this type are believed to have been among the first complex biological communities to appear on the planet more than 3 billion years ago during an era when oxygen barely existed in the atmosphere.
And the entire surface of the Earth was chemically hostile to anything more complex.
The canyon provides unusual conditions for their survival.
Deep within the system, away from direct sunlight and large animal disturbance, spring water creates stable micro environments where temperature and chemistry remain relatively constant.
In several locations along the canyon’s walls, researchers have identified matte communities living in close association with water seeps, environments that have likely remained relatively undisturbed for extraordinarily long periods.
A 2010 study published in the journal plus one examined microbial diversity in springs within the canyon system and found a remarkable range of bacterial and archal species including organisms related to groups that had previously only been documented in extreme environments like hydrothermal vents and hypers salin lakes.
The canyon’s limestone chemistry creates conditions that favor certain unusual metabolic pathways.
And some of the microbial communities in the deepest springs show evidence of surviving on minimal light or even in complete darkness.
These communities are not merely interesting relics.
They are windows into the chemistry of the ancient Earth.
And researchers study them as analoges for life that might exist on other planets, particularly on Mars, where spring-fed environments may once have existed, or on icy moons like Europa, where liquid water persists beneath frozen surfaces.
The Grand Canyon, in other words, is not just a geological record.
In its smallest and least visible organisms, it may also be a laboratory for astrobiology.
The terrifying creation of the Grand Canyon.
The Grand Canyon stretches 277 m, spans up to 18 m wide, and plunges more than a mile deep in places.
Its walls expose nearly 2 billion years of Earth’s history, a scale almost impossible to process standing on the South Rim.
And the story of how it formed is both immense and geologically speaking startlingly recent.
It begins 1.8 billion years ago when volcanic and metamorphic processes deep in the crust formed the ancient basement rock.
The Vishnu shist and zoroastaster granite still visible at the canyon’s bottom among the oldest exposed rock in North America.
Above it, hundreds of millions of years of sediment piled up in layers.
Seabeds, desert dunes, river deltas, tidal flats.
Each one a different world stacked on the same spot.
Around 70 million years ago in the late Cretaceous, the collision of the North American and Pacific plates began pushing a once flat landscape skyward, forming the Colorado Plateau.
Then roughly 6 million years ago, the Colorado River found its path across the rising plateau and began cutting down through it.
As the plateau climbed and the river held steady near sea level, the canyon deepened, accelerated by freeze thaw cycles, tributary streams, and even ancient landslides that damned the river and formed temporary lakes.
Not everyone agrees on the timeline, though.
For most of the 20th century, geologists debated whether the canyon was 6 million years old or as much as 70 million.
A 2012 science study by geologist Rebecca Flowers and colleagues at the University of Colorado used helium isotope analysis to argue that part of the western canyon may have been carved 70 million years ago, then buried and recut by the modern river.
The debate remains unresolved.
One of American geologyy’s more stubborn mysteries, the case of disappearing and reappearing bodies.
In 2021, a routine search turned strange within hours.
A 45year-old Hungarian man, Gabbor Burki Tungani, had been reported missing after his family lost contact with him.
His car and belongings turned up at the visitor center.
Search teams tracked him 430 ft below the south rim to Yavapai Point, eventually finding his body about 131 m down.
That alone was sobering.
Then nearby, they found a second body, Scott Walsh, last seen stepping off a shuttle bus at the South Rim in 2015.
He’d been missing 6 years.
His clothing had blended so seamlessly with the surrounding rock that searchers had passed within range of him multiple times without noticing, and his body was found roughly 5 km from where he’d last been seen.
The terrain makes this kind of thing almost inevitable.
Grand Canyon National Park averages about 12 deaths a year, mostly from heat, medical emergencies, and falls rather than disappearances.
But the extreme heat, sparse shade, and punishing terrain can break down a healthy adult fast.
Complicating matters further is the great unconformity, a gap in the rock record spanning roughly a billion missing years.
First named by John Wesley Powell during his 1869 river expedition.
Once blamed on erosion, it’s now thought that tectonic activity may have stripped those layers away.
And the irregular terrain it creates only adds to the difficulty of finding anyone lost within it.
The canyon hides what falls into it.
It always has.
The Tusian ruins.
3 mi south of the south rim, tucked into the forest, sit the remains of an ancient village most visitors never find.
The Tusaian ruin, a small but wellpreserved ancestral PBLO and settlement, was built around 1185 AD, a date pinned down through dendrochronology, matching tree ring patterns in the site’s juniper timbers to known climate records.
Its builders, ancestors of today’s Hopi, Zouri, and other Puebloan peoples, raised a central plaza ringed by storage rooms, living quarters, and two kas, circular, partly underground ceremonial spaces still central to Pueblo and religious life.
The plaza faced south to catch the low winter sun.
A choice both practical and spiritually significant in a culture whose ceremonial calendar tracked the sun closely.
Kievas were entered by ladder through a roof opening which many hope he described as symbolizing passage from the lower world into this one.
The hard kbab limestone underlying the rim kept builders from digging deep, leaving Tusian’s kas shallower than those built on softer soil elsewhere.
In the 1930s, archaeologists from Gila Pueblo excavated the site with park service permission, agreeing to leave half the artifacts at the canyon and build a museum.
That museum, first called the Wayside Museum of Archaeology, now the Tusian Museum, opened in 1932 and still operates today, interpreting the histories of five tribes tied to the canyon.
The Havasupai, Hopi, Halapai, Navajo, and Southern Pyute.
Among its standout pieces are split twig figurines.
Small animal forms twisted from single willow branches 2,000 to 4,000 years old and found in caves across the canyon.
They’re among the oldest deliberate art or ceremonial objects ever recovered here.
And they reshaped how long researchers believe this landscape has mattered to human communities.
The Havasupai tribe.
Perhaps the most remarkable thing in the Grand Canyon is that people still live at the bottom of it.
The Havasupi, people of the Blue Green Water, have inhabited Havasu Canyon, a tributary of the Grand Canyon for at least 800 years by their own account and likely far longer.
Their village, Supai, sits 10 miles from the nearest road, reachable only on foot, horseback, or helicopter.
The most remote, permanently inhabited settlement in the contiguous United States, and the only one where male still arrives by mule.
Life followed the canyon’s vertical geography.
Families farmed corn, beans, squash, and melons on the fertile tanto platform terraces in spring and summer, then moved up to the plateau to hunt and gather through fall and winter.
Spanish priest Francisco Garces became the first European to reach Havasu Canyon in 1776, recording a village entirely unknown to outsiders until then.
Isolated not by any barrier, but by a landscape the Havasupai simply knew better than anyone else.
That isolation broke down in the 19th century as settlers claimed the trib’s plateau lands.
In 1903, President Theodore Roosevelt descended the Bright Angel Trail and encountered Havasupai families farming at Indian Garden.
He reportedly told them a national park was coming and they’d need to leave.
The park service forced the last residents out in 1928, confining the tribe to a 518 acre reservation, a fraction of their former territory without the plateau lands they’d relied on for generations.
After decades of appeals, President Gerald Ford signed legislation in 1975 returning 185,000 acres of rim territory to the Havaupai, the largest land claim settlement for an indigenous nation in the post-war era.
Today, the tribe runs a carefully managed tourism economy around Havasu Creek’s turquoise waterfalls while still fighting to protect the groundwater sustaining their village from upstream uranium mining.
Their presence at the canyon’s bottom is itself a kind of living discovery.
Proof this place has been home far longer than the park surrounding it.
The Grand Canyon has been studied for over 150 years by scientists and for millennia by the people who call it home.
And it keeps yielding discoveries no one was looking for.
313 millionyear-old footprints.
Ice Age ground sloths preserved in dry caves.
A river system in crisis.
Uranium deposits threatening ancient water sources.
Microbial life that might point toward life on other planets.
An age debate still unresolved and indigenous knowledge woven into the landscape that outlasted colonization and removal.
