CASE FILE: RTC-029
Mount Everest: What They Don't Tell You
🟡 CASE STATUS: OPEN
🔎 The Mystery
When most people think of Mount Everest, they picture breathtaking views, colourful prayer flags and triumphant climbers standing on the roof of the world.
But beyond the photographs lies a far darker reality.
A place where the air contains so little oxygen that your body slowly begins to shut down.
A place where your own brain can begin working against you.
A place where helicopters cannot simply fly in to rescue you.
A place where frozen bodies may remain for decades because bringing them home is often too dangerous.
Every year, hundreds of climbers attempt to conquer the world's highest mountain.
Some achieve their dream.
Others never make it home.
So what really happens on the roof of the world?
Let's open the case file.
🏔️ The World's Highest Mountain
Mount Everest stands approximately 8,849 metres (29,032 feet) above sea level on the border between Nepal and the Tibet Autonomous Region of China.
For many, reaching its summit is the ultimate achievement.
Since Sir Edmund Hillary and Tenzing Norgay first successfully reached the summit in 1953, thousands of climbers have followed in their footsteps.
Yet despite modern clothing, satellite navigation, weather forecasting and specialist equipment, Everest still claims lives almost every climbing season.
What makes one mountain so incredibly dangerous?
🤔 Is Everest Really the Biggest Mountain?
The answer depends entirely on how you measure it.
Most people assume Everest holds every mountain record.
In reality, it doesn't.
🏔️ Highest Above Sea Level
Mount Everest
Height: 8,849 metres
This is the measurement almost everyone learns at school.
Everest's summit sits higher above sea level than any other point on Earth.
This makes it the highest mountain above sea level.
🌊 Tallest From Base to Summit
Mauna Kea, Hawaii
Total height: approximately 10,210 metres
This surprises many people.
Although only 4,207 metres of Mauna Kea rises above sea level, over 6,000 metres of the mountain lies hidden beneath the Pacific Ocean.
If measured from its true base on the ocean floor to its summit, Mauna Kea is actually taller than Mount Everest.
🌍 Furthest From the Centre of the Earth
Mount Chimborazo, Ecuador
Another surprise.
Earth isn't a perfect sphere.
It bulges slightly around the Equator.
Because Chimborazo sits close to this equatorial bulge, its summit is actually the furthest point from the centre of the Earth, despite being only 6,263 metres above sea level.
So depending on how you define "highest"...
- 🏔️ Highest above sea level: Mount Everest
- 🌊 Tallest from base to summit: Mauna Kea
- 🌍 Furthest from Earth's centre: Mount Chimborazo
Sometimes the answer depends entirely on which question you're asking.
☠️ Entering the Death Zone
One of the most infamous parts of Everest is known as the Death Zone.
This begins at approximately 8,000 metres above sea level.
Above this altitude, the human body can no longer properly adapt.
Instead of recovering...
It slowly begins to deteriorate.
The air still contains around 21% oxygen, just like it does at sea level.
The problem isn't the percentage.
It's the air pressure.
Because the air is much thinner, every breath contains far fewer oxygen molecules.
Your body is effectively being starved of oxygen.
Most climbers rely on bottled oxygen simply to survive long enough to reach the summit and descend again.
Even then, time is against them.
🫁 Why Does the Human Body Begin to Deteriorate?
Humans simply weren't designed to live at these altitudes.
At Everest's summit, the atmospheric pressure is only around one-third of that at sea level.
That means every breath delivers far less oxygen into your bloodstream.
Your body immediately begins working harder just to stay alive.
As oxygen levels fall:
- Your heart beats faster.
- Your breathing becomes rapid and laboured.
- Your muscles weaken.
- Your brain receives less oxygen.
- Your body burns energy much faster.
- Digestion slows dramatically.
- Dehydration becomes severe.
- Your immune system becomes weaker.
The longer a climber remains in the Death Zone, the greater the risk that vital organs begin to fail.
This is why experienced climbers spend as little time there as possible.
🧠 When Your Brain Begins Working Against You
One of the most frightening dangers on Everest isn't the cold.
It's your own brain.
Without enough oxygen, the brain struggles to function properly.
Climbers have reported:
- hearing voices
- seeing people who weren't really there
- believing invisible companions were walking beside them
- forgetting simple tasks
- becoming unable to make sensible decisions
Some climbers have removed gloves in freezing temperatures without understanding the consequences.
Others have sat down "just for a moment" and never stood up again.
Extreme altitude changes the way people think.
Sometimes those changes become fatal.
🚨 High Altitude Illness
Two life-threatening conditions are especially feared on Everest.
High Altitude Cerebral Oedema (HACE)
HACE occurs when fluid begins building around the brain.
Symptoms include:
- severe headaches
- confusion
- stumbling while walking
- slurred speech
- hallucinations
- unconsciousness
Without immediate descent, HACE is frequently fatal.
High Altitude Pulmonary Oedema (HAPE)
HAPE affects the lungs.
Fluid begins filling the air sacs, making it increasingly difficult to breathe.
Victims may experience:
- extreme breathlessness
- persistent coughing
- chest tightness
- blue lips or fingertips
- severe exhaustion
Without rapid treatment and descent, HAPE can also become fatal.
🚶 Why Do Climbers Walk Past People Who Are Still Alive?
Perhaps no aspect of Everest is more difficult to understand.
Stories occasionally emerge of climbers passing someone who is seriously ill or dying.
At first, this seems impossible to comprehend.
Surely someone would stop to help.
At sea level, most of us probably would.
At nearly 9,000 metres...
Everything changes.
Imagine trying to lift another adult while you yourself can barely breathe.
Each step feels exhausting.
Your oxygen is running out.
Your fingers are becoming numb.
The weather may change at any moment.
Attempting a rescue could easily result in two deaths instead of one.
Many climbers have risked or even lost their own lives trying to save others.
These are not easy decisions.
They are heartbreaking choices made in one of the most unforgiving environments on Earth.
⚰️ Why Are Bodies Left on the Mountain?
Recovering someone from Everest is one of the most dangerous recovery operations in the world.
Depending on where a climber has died, it may require:
- multiple experienced Sherpas
- specialist climbing equipment
- stable weather conditions
- enormous physical effort
Some recoveries cost tens of thousands of pounds and place every rescuer in danger.
For this reason, many climbers remain where they lost their lives.
The freezing temperatures preserve bodies remarkably well.
For many years, some even became unofficial landmarks used by climbers to judge their progress along the route.
In recent years, several long-standing bodies have been respectfully recovered, but many still remain on the mountain.
🚁 Why Can't Helicopters Rescue Everyone?
One of the biggest questions people ask is:
"Why don't helicopters simply fly to the summit?"
The answer lies in physics.
Helicopters rely on their rotor blades pushing against air to generate lift.
The higher they fly...
The thinner the air becomes.
As altitude increases:
- rotor blades produce less lift
- engines generate less power
- hovering becomes increasingly difficult
- strong winds become even more dangerous
Near Everest's summit, there simply isn't enough dense air for most helicopters to operate safely.
There have been extraordinary rescue flights from lower on the mountain, and one specially modified helicopter famously landed near the summit during a test flight.
However, routine helicopter rescues from the summit are not possible.
For most climbers...
The only way back down...
Is to walk.
🧗 Traffic Jams on the Roof of the World
Ironically, one of the greatest dangers isn't always the mountain itself.
It's other climbers.
On busy summit days, hundreds of people may attempt the climb within the same weather window.
This can create queues along narrow ridges where climbers are forced to wait.
Every extra minute means:
- less bottled oxygen
- greater exhaustion
- increased exposure to freezing temperatures
- higher risk of altitude sickness
Several tragedies have occurred after climbers reached the summit too late and ran out of oxygen during their descent.
Sometimes, reaching the top is only half the battle.
Many experienced mountaineers have a saying:
"The summit is optional. Getting home is mandatory."
💰 The Cost of Standing on the Roof of the World
Climbing Everest is one of the most expensive adventures on Earth.
A guided expedition typically costs anywhere between £30,000 and well over £100,000, depending on the route, equipment and level of support.
These costs often include:
- climbing permits
- experienced guides
- Sherpas
- bottled oxygen
- specialist equipment
- food and accommodation
- transport and logistics
For the Sherpa community, Everest provides an important source of income.
However, they also face some of the greatest dangers, making multiple trips through hazardous sections of the mountain to support climbers.
🧹 The World's Highest Rubbish Dump?
Everest is famous for its breathtaking beauty.
Unfortunately, it has also become famous for something far less inspiring.
Rubbish.
Over decades of climbing, the mountain has accumulated:
- empty oxygen cylinders
- broken tents
- discarded ropes
- food packaging
- climbing equipment
- clothing
- human waste
Recent clean-up expeditions have removed tonnes of rubbish from the mountain.
Even so, keeping Everest clean remains an enormous challenge.
The harsh conditions make every item difficult to remove.
Some people have even described Everest as the world's highest rubbish dump.
🌨️ Famous Everest Tragedies
Mount Everest has witnessed some of the most heartbreaking disasters in mountaineering history.
While thousands of climbers have reached the summit safely, the mountain has also reminded the world that no amount of experience can completely remove its dangers.
Some of the most well-known disasters include:
-
1996 Everest Disaster – A sudden storm trapped multiple climbing teams high on the mountain, resulting in the deaths of eight climbers in a single day. This tragedy inspired the bestselling book Into Thin Air by Jon Krakauer.
-
2014 Khumbu Icefall Avalanche – Sixteen Sherpas lost their lives while carrying equipment through one of the mountain's most dangerous sections.
-
2015 Nepal Earthquake – A devastating earthquake triggered an avalanche that swept through Everest Base Camp, killing at least twenty-two people and injuring many more.
-
2019 Summit Traffic Jams – Long queues of climbers near the summit forced many to spend far longer than planned in the Death Zone, contributing to multiple deaths.
Each tragedy has raised difficult questions about commercial expeditions, overcrowding and whether some people attempt Everest without enough experience.
🌊 Everest vs the Deep Ocean
Standing on the summit of Everest feels like standing on top of the world.
But what happens if we turn the mountain upside down?
Mount Everest rises approximately 8,849 metres above sea level.
The deepest known point in the world's oceans, Challenger Deep in the Mariana Trench, reaches approximately 10,935 metres below sea level.
That means the deepest part of our oceans is over 2 kilometres deeper than Everest is tall.
It's an incredible comparison.
We've climbed nearly 9 kilometres into the sky.
Yet our planet stretches even further beneath the sea.
🌍 What If Everest Were Placed Inside the Ocean?
Imagine carefully lowering Mount Everest into the Mariana Trench.
Most people assume the summit would still poke above the ocean surface.
It wouldn't.
Even after placing the entire mountain inside Earth's deepest known trench, the summit would still remain more than 2 kilometres beneath the water.
That simple thought experiment completely changes how we imagine our planet.
The oceans are even deeper than most of us realise.
🤿 Have Humans Explored More of Everest or the Deep Ocean?
This answer surprises many people.
Humans have successfully stood on the summit of Everest thousands of times.
By comparison, only a handful of people have ever reached Challenger Deep.
Why?
Because both places are hostile...
But in completely different ways.
Everest
Everest tries to kill you through:
- lack of oxygen
- freezing temperatures
- powerful winds
- exhaustion
- altitude sickness
Challenger Deep
The deep ocean presents the opposite problem.
Instead of too little pressure...
There is far too much.
At Challenger Deep, the pressure is more than 1,000 times greater than the air pressure at sea level.
That's equivalent to having roughly 50 jumbo jets pressing down on an area the size of a human body.
Even a tiny weakness in a submersible could have catastrophic consequences.
🌊 Do We Actually Know Where the Ocean Ends?
This leads to another fascinating question.
Do we actually know the deepest point of Earth's oceans?
The answer is...
As far as current scientific evidence shows, yes.
Scientists have spent decades mapping the ocean floor using:
- sonar
- satellites
- underwater surveys
- research expeditions
Today, the Challenger Deep is recognised as the deepest known point on Earth.
Could another location be a few metres deeper?
Possibly.
As technology improves, measurements continue to become more precise.
However, scientists consider it extremely unlikely that an entirely new trench several kilometres deeper has somehow remained hidden.
🗺️ But Have We Actually Explored the Ocean?
Not even close.
Imagine flying over a huge forest.
From above, you can clearly see the rivers, hills and valleys.
But you've only walked through a tiny part of it.
That's exactly what we've done with Earth's oceans.
We've mapped much of the seafloor.
But we've only directly explored a tiny fraction of it in detail.
Many areas have never been visited by humans.
Others have never even been photographed.
The deep ocean remains one of Earth's last great frontiers.
🐙 What Could Still Be Down There?
Scientists continue making incredible discoveries beneath the waves.
These include:
- previously unknown fish
- glowing jellyfish
- giant sea spiders
- strange crustaceans
- hydrothermal vents filled with unique life
- underwater volcanoes
- deep caves
- new geological formations
Some species have only ever been seen once.
Others are known from a single specimen.
There may still be thousands of species waiting to be discovered.
Every deep-sea expedition has the potential to reveal something entirely new.
🌙 We Know More About the Moon Than Parts of Our Own Ocean
One of the most surprising facts is that scientists have mapped the surface of the Moon in greater detail than many areas of Earth's deep ocean floor.
Why?
Because it's actually easier to observe the Moon from orbit than it is to see through nearly eleven kilometres of dark seawater.
Sometimes the greatest mysteries aren't millions of miles away.
They're hidden beneath our own oceans.
🤯 Detective's Discovery
By now, you may have noticed something surprising.
Mount Everest doesn't actually hold every mountain record.
It depends entirely on how you measure it.
🏔️ Highest Above Sea Level
Mount Everest
8,849 metres
The world's highest point above sea level.
🌊 Tallest From Base to Summit
Mauna Kea, Hawaii
Approximately 10,210 metres
Although only 4,207 metres rises above sea level, over 6,000 metres lies beneath the Pacific Ocean.
Measured from its true base on the ocean floor, Mauna Kea is actually taller than Everest.
🌍 Furthest From the Centre of the Earth
Mount Chimborazo, Ecuador
Earth isn't a perfect sphere.
Because it bulges around the Equator, Chimborazo's summit is actually the point furthest from the Earth's centre, despite being much lower than Everest above sea level.
So which mountain is the highest?
It depends on the question.
- 🏔️ Highest above sea level: Mount Everest
- 🌊 Tallest from base to summit: Mauna Kea
- 🌍 Furthest from Earth's centre: Mount Chimborazo
Sometimes, the most interesting discoveries come from asking better questions.
🌍 A Reminder of How Small We Really Are
Whether we're standing on the summit of Everest...
Or exploring the deepest ocean trench...
One thing becomes clear.
Human beings have achieved remarkable feats of exploration.
Yet our own planet still contains places that remain incredibly dangerous, difficult to reach and filled with mystery.
Perhaps the greatest lesson Everest teaches isn't that humans can conquer nature.
It's that nature will always be greater than us.
Every successful climb is not a victory over the mountain.
It's a reminder of how much courage, preparation, teamwork and humility are needed simply to survive in one of Earth's harshest environments.
🟡 CASE STATUS
OPEN
Mount Everest continues to test science, medicine and the limits of human endurance.
Although many of its dangers are now well understood, every climbing season raises new questions about ambition, risk and the extraordinary lengths people are willing to go to stand on the roof of the world.
At the same time, comparing Everest with the deepest oceans reminds us that our greatest mysteries aren't always found in space.
Some are still here on Earth, waiting to be explored.
❓ FINAL QUESTION
If you had the opportunity to stand on the highest point on Earth, knowing everything you've just discovered...
Would you attempt the climb, or would some mysteries be better admired from below?
📂 CASE FILE: RTC,029
STATUS: OPEN
Every case has evidence. Every claim deserves investigation.
What do you think? 🐇🔍
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