This incident refers to the death of nine ski mountaineers in the northern Ural Mountains on the evening of February 2, 1959.

The leader of this team was called Dyatlov. They had an accident while climbing the east ridge of the "Mountain of Death" and the entire team died.

Subsequent investigation into the matter revealed that the climbers' tents were cut open from the inside and they were barefoot in the thick snow. The bodies showed no signs of struggle.

One had a broken skull, two broken ribs, a missing tongue, and some were wrapped in tattered clothes that seemed to have been cut from dead people.

The study found that the clothes of the deceased contained very strong radioactive materials, although the radioactive materials may have been added later.

But there is no evidence of involvement.

An investigating doctor said the fatal injuries to the three dead may have been caused not by humans but by an extreme force.

This unknown force remains a mystery until now.

Details: 1. The tent was cut open from the inside.

2. The dead people from near to far from the tent are: three people who obviously wanted to come back to the tent lined up one after another. The two people who were near the fire in the woods should be the first to die. They were stripped naked and their clothes were removed.

For others to wear.

The furthest ones died in the river.

A girl's tongue is missing.

A man's skull was shattered.

3. All the people were naked, and their shoes and most of their clothes were left in the tent.

4. Their clothes were found to contain radioactive rays, and some family members claimed that at the funeral they found that their faces looked as if they had been sunburned and their hair was gray.

5. There were signs of fire, and even branches 5 meters high were broken.

Detailed process: Nine experienced cross-country skiers who were by no means novices suddenly left their tents in the middle of the night in a hurry, without even taking time to bring their skis, food and their own warm clothes.

Wearing their sleeping clothes, these young people quickly ran down the snow-covered hillside toward a dense forest. However, in the biting cold of about minus 30 degrees Celsius, there was no hope of survival in the forest.

Baffled investigators said the ski expedition was killed by "an extremely powerful unknown force" - then abruptly ended the investigation and classified the documents as top secret.

The death, which occurred 57 years ago on a Saturday, remains one of the most mysterious events in the Urals.

Although records related to the incident were declassified in the early 1990s, friends of the deceased are still searching for answers.

"If I had a chance to ask God a question, it would be, 'What happened to my friends that night?'" said Yury Yudin, the only surviving member of the ski expedition.

On January 28, 1959, Yudin and nine other students from the Ural Polytechnic Institute set out on a ski expedition to the Otorten Mountains in the northern Urals.

Yudin fell ill near Vizhai, so he left the team and returned.

Vizhai is the last settlement on the way to the mountains.

In late January 1959, Yuri Yudin hugged Lyudmila Dublinina when he left the team due to illness, next to Igor Dyatlov.

What happened next has been reconstructed based on diaries and photos taken by other members of the expedition.

This article was written with reference to copies of the diary and photographs included in the investigator's report.

The ski team, led by 23-year-old Igor Dyatlov, set up camp on the evening of February 2 on the slopes of the Kholat-Syakhl mountain adjacent to the Otorten mountain.

They set up their tent around 5:00 p.m., investigators said, based on photos developed from a roll of film found among the team's abandoned belongings.

A photo developed from a roll of film found at the camp, showing the ski team setting up camp at 5 p.m. on February 2, 1959.

Why the nine skiers picked this location to camp is unclear.

In fact, the expedition team could have walked 1.5 kilometers down the mountain to camp in a forest, which would provide shelter and help them fight the bad weather.

"Dyatlov may not want to go back, or he decided to camp on the hillside for a practical exercise." Yudin said in a telephone interview from Solikamsk, a town near Yekaterinburg.

Yekaterinburg.

When the ski team left the academy and set off for the expedition, Dyatlov promised to send a telegram as soon as they returned from Otorten and reached Vizhai, which he said would be no later than February 12th.

But Yudin said Dyatlov told him when they parted that the ski team might return a few days later than planned.

Therefore, although the ski team did not show up on February 12, no one was worried.

It was not until February 20, after relatives of the team members raised the alarm, that the college dispatched a search and rescue team composed of teachers and students.

The police and military later sent planes and helicopters.