Running and swimming
How long do you think a person can run without rest? Your answer is definitely less than the real possibilities. Scientists have proven that many men from the Tarahumara tribe (Mexico) can cover a distance of more than 150 km. This is simply necessary for them in order to survive, driving swift-footed deer. Karl Lumholtz in his scientific writings described the case when one of the Indians ran 600 km in 5 days, eating only water and cornmeal.
Walter Peniche was able to swim 167 km from Havana to Florida. And Ben Haggard managed to conquer the distance of an incredible figure of 221 km.
Hunger
Elaine Jones weighed a lot - 143 kg. She decided to lose weight, but not just to lose weight on a diet - she decided to starve. For 119 days, under the constant supervision of doctors, she received vitamin injections and drank 3 liters of water. The result for 17 weeks the woman lost 62 kg.
Heat and cold
In 1985, English fishermen sank in icy water. But one managed to survive. He swam to shore for more than 5 hours. After that, he walked barefoot in the snow for another three hours.
Strength
Nikolai Turbas lifted 3 adult men to the knee with just one little finger from the floor.
Alexander Zass, whom everyone knows as Samson, weighed 80 kg, but at the same time he was able to carry a horse weighing up to 400 kg on his shoulders.

In fact, there are many more such examples in history. So think again before you say "it's impossible".