Towering 8,849 metres (29,030 feet) above sea level, the lofty peak of Mount Everest is the ultimate challenge for any mountaineer.
Now, a Polish daredevil has completed a breathtaking feat which makes simply climbing Earth's highest peak seem easy.
Andrzej Bargiel, 37, has become the first person to climb then ski down Mount Everest without any bottled oxygen.
Pausing at the peak to record a video for his Instagram, Mr Bargiel declared: 'I am on top of the highest mountain in the world and I’m going to descend it on skis.'
For context, while more than 6,000 people have climbed Mount Everest, less than 200 have done so without oxygen, and none have even attempted to ski down afterwards.
After climbing through the 'death zone' above 8,000 metres, where the air is too thin to sustain life, Mr Bargiel strapped on his skis and launched himself off the mountain.
Starting at 15:00 local time on Monday, Mr Bargiel carefully slalomed down to Camp Two at 6,400 metres (21,000 feet).
After resting overnight, when it became too dark to ski, he then continued on to reach Base Camp at 5,364 metres (17,600 feet) on Tuesday morning.
Polish daredevil Andrzej Bargiel, 37, has become the first person in history to ski down Mount Everest without the use of bottled oxygen
Starting at 15:00 local time on Monday, Mr Bargiel strapped on his skis at the peak of Mount Everest and began the 3,500–metre (11,500 feet) descent to Base Camp below
It took Mr Bargiel two days to ski down the mountain, after darkness forced him to pause overnight after reaching Camp Two at 6,400 metres (21,000 feet)
Even before attempting to ski down the mountain, Mr Bargiel faced challenges that could have easily proven fatal.
Most climbers avoid the mountain during Autumn due to the deep snow, powerful winds, and lack of support from other expeditions.
During the four–day ascent, Mr Bargiel and his guide Dawa 'Speed' Sherpa were trapped in the death zone by fresh heavy snowfall.
Here, above 8,000 metres, the air contains just a third of the usual oxygen and is so thin that the human body can never acclimatise to the altitude.
Mr Bargiel was trapped in this region for 16 hours before he could make his ascent, which would be considered potentially deadly even with supplementary oxygen.
Mr Bargiel told Red Bull: 'The ascent was difficult because other expeditions are closed at this time of year.
'It's incredibly high. You have to be well prepared to be able to function for 16 hours above 8,000m.'
Astonishingly, Mr Bargiel's groundbreaking descent included skiing through the notorious Kumbu Icefall – a 1.6–mile (2.57km) labyrinth of constantly shifting crevasses, snow bridges, and overhanging ice blocks.
Mr Bargiel is not the first person to ski down Mount Everest, but he is the only person to ever do so without using supplementary oxygen
Of the 6,000 people to have climbed Mount Everest, fewer than 200 have completed the climb without using oxygen. None of those climbers has ever attempted to ski down the mountain afterwards
Astonishingly, the descent included skiing through the Kumbu Icefall – a 1.6–mile (2.57km) labyrinth of constantly shifting crevasses, snow bridges, and overhanging ice blocks
According to Red Bull, Mr Bargiel was helped through the icefall by a drone flown by his brother.
That assistance allowed him to navigate the deadly pass without using ropes or taking off his skis at any point, something completed only once before by Davo Karnicar of Slovenia in 2000.
Mr Bargiel says: 'I knew that the difficult autumn conditions and plotting the descent line through the Khumbu Glacier would be the greatest challenge I could ever face.'
After reaching Base Camp, Mr Bargiel was honoured with a Tibetan khata, a traditional scarf awarded as a sign of respect at major moments in someone's life.
Donald Tusk, the Polish prime minister, wrote on X: 'Sky is the limit? Not for Poles! Andrzej Bargiel has just skied down Mount Everest.'
This monumental feat is the product of years of preparation and is Mr Bargiel's third attempt to ski down Mount Everest.
In 2019, he was forced to abandon the attempt due to an overhanging ice block, while high winds put an end to his second attempt in 2022.
But becoming the first person to ski down Mount Everest without oxygen is only one part of Mr Bargiel's ambitious plans.
The ascent was made even more difficult by the Autumn snowfall, which trapped Mr Bargiel and his guide Dawa 'Speed' Sherpa in the 'death zone' above 8,000 metres for 16 hours
Mr Bargiel intends to become the first person to ski down all 14 8,000–metre peaks without supplementary oxygen, and has already conquered six
The daredevil has an ambition to become the first person to ski down all 14 of the world's 'eight–thousanders' – the peaks higher than 8,000 metres above sea level.
So far, he has already skied down six of these monumental peaks, including becoming the first person to ski down K2 in 2018.
For reference, K2 is widely considered the most deadly mountain in the world and kills around 13 to 15 per cent of all climbers.
In 2023, Mr Bargiel also became the first person to ski all four mountains over 8,000 metres in the Karakoram range, the second–highest range after the Himalayas.
WHAT IS BEING DONE TO REDUCE RUBBISH ON MOUNT EVEREST?
Decades of commercial mountaineering have turned Mount Everest into the world's highest rubbish dump.
As the number of climbers on the mountain has soared - at least 600 people have scaled the world's highest peak so far this year alone - the problem of waste disposal has worsened.
The worst rubbish is found at Camp Two, which is 21,000 foot (6,400m) above sea level.
Five years ago Nepal implemented a $4,000 (£3,000) rubbish deposit per team that would be refunded if each climber brought down at least eight kilograms (18 pounds) of waste.
On the Tibet side of the Himalayan mountain, they are required to bring down the same amount and are fined $100 (£75) per kilogram if they don't.
In 2017 climbers in Nepal brought down nearly 25 tonnes of trash and 15 tonnes of human waste - the equivalent of three double-decker buses - according to the Sagarmatha Pollution Control Committee (SPCC).
This season even more was carried down but this is just a fraction of the rubbish dumped each year, with only half of climbers lugging down the required amounts, the SPCC says.
Instead many climbers opt to forfeit the deposit, a drop in the ocean compared to the $20,000 (£15,000) - $100,000 (£75,000) they will have forked out for the experience.
Another solution, believes Ang Tsering Sherpa, former president of the Nepal Mountaineering Association, would be a dedicated rubbish collection team.