50 interesting facts about human

Human is a fascinating creature that, despite being studied in every possible way, still contains a lot of secrets. Those that have been discovered allow us to see the uniqueness and complexity of not only man as a whole, but each individual. Below are 50 interesting facts about the human body and mind:

1. Human DNA is 60% identical to banana DNA – Surprising as it may seem, humans and bananas share a large percentage of genetic material. It’s a reminder of the common origin of all life.
2. Every person has a unique tongue print – Like fingerprints, tongue prints are unique to each person and could theoretically be used for identification.
3. Every person has a unique iris pattern – The iris pattern is even more complex and unique than fingerprints. For this reason, iris scanning is often used in security systems as a very effective identification method.
4. Human bones are harder than steel – Compared to steel of similar mass, human bone is about five times harder. This is one reason why our bones can withstand such heavy loads.
5. The human body glows – Although it is not visible to the naked eye, the human body emits a faint light. This is related to metabolic processes.
6. The human body glows brightest around 4pm – The body’s bioluminescence peaks towards the end of the day, although this light is invisible to the human eye.
7. The human stomach has a new lining every 2-4 days – To protect itself from the hydrochloric acid that digests food, the stomach lining is regularly renewed.
8. The human brain works faster than a computer – The human brain processes information at a speed of around 60-120 meters per second, which is equivalent to around 220-430 km/h. This speed depends on the type of nerve fibers (whether they are myelinated or not) and the distance the signal has to travel in the brain. This allows the brain to react very quickly to stimuli, process information and make decisions in a fraction of a second. This means it can work faster than most modern computers.
9. Everyone sleeps about a third of their life – The average person sleeps for around 26 years of their entire life, which is crucial for health and regeneration.
10. Human blood is salty for the same reason as seawater – The salt concentration in our blood is similar to that of the oceans, a vestige of our evolutionary heritage.
11. The sense of smell is comparable to a dog’s – Although dogs have a much more developed sense of smell, the human nose is also capable of detecting trillions of different odors.
12. The eyes can distinguish about 10 million colors – Although we are not able to name all of these shades, our eyes are capable of distinguishing them.
13. The brain does not feel pain – The brain does not have pain receptors, so it is not able to feel pain itself. Therefore, brain surgery can be performed on patients while they are fully conscious.
14. We are made of stardust – Most of the elements that make up our bodies, such as carbon, oxygen and nitrogen, come from supernova explosions that occurred billions of years ago.
15. The human microbiome is incredibly diverse – There are more bacteria living in our bodies than cells. It is estimated that the human body is inhabited by about 39 trillion bacteria, which is comparable to the number of cells in our body.
16. The human body produces about 300 billion new cells every day – Most of these are red blood cells, which carry oxygen around the body.
17. Each foot has 26 bones – The human foot is made up of 26 bones, which makes up 25% of all the bones in the body. This gives the feet incredible flexibility and the ability to absorb shock.
18. The skin is the largest organ in the body – The skin of an adult human has a surface area of ​​about 2 square meters and weighs about 3.5-4.5 kg, making it the largest organ in our body.
19. We take about 20,000 breaths a day – The average adult breathes about 12 to 20 times a minute, which gives us about 20,000 breaths each day.
20. The brain uses 20% of the body’s energy – Even though the brain makes up only about 2% of the body’s weight, it uses a whopping 20% ​​of the body’s energy.
21. Microscopic mites live on our eyelashes – Tiny Demodex mites live on human eyelashes. They are usually harmless, although they can cause skin problems if they are overpopulated.
22. The body can produce vitamin D – Human skin can produce vitamin D when exposed to sunlight. It is one of the few vitamins that the body can synthesize on its own.
23. Fingers grow faster than hair – In fact, fingernails grow about four times faster than toenails, and hair grows at an average rate of about 1.25 cm per month.
24. The human eye has over 2 million parts – The eye is one of the most complex organs in the human body, with over 2 million parts that work together to provide us with vision.
25. The human brain generates enough energy to power a light bulb – The human brain generates about 20 watts of electricity, which would be enough to power a small light bulb.
26. Our brain can “feel” situations that didn’t happen – Through a phenomenon called confabulation, the brain can create false memories that seem real, even though they never happened.
27. The tongue is the most important muscle for speaking – Although many muscles are involved in speaking, the tongue is the most important, allowing us to articulate sounds.
28. The human brain is made up of 75% water – Although the brain is a solid organ, a large portion of it is water. Therefore, hydration is crucial for it to function properly.
29. The human heart beats about 100,000 times a day – The average adult heart beats an average of 60-80 times per minute, which is about 100,000 beats per day.
30. The human heart beats in sync with the music we listen to – Our heart rates can adjust to the rhythm of the music, meaning that fast, rhythmic songs can speed up the heartbeat, while slower, calmer tunes can slow it down. This is one of the reasons why music can have such a powerful impact on our emotions and well-being.
31. Human saliva contains a natural painkiller – Enkephalin, a substance found in saliva, acts as a natural painkiller.
32. The human belly button is home to hundreds of different species of bacteria – The bacterial flora in the belly button is so diverse that it may contain species found nowhere else on the body.
33. The ear bones are the only bones that don’t grow – The ossicles in the middle ear are the only bones that don’t change size from birth.
34. A human can survive for up to a month without food, but only a week without water – Water is essential for survival, and without it the body quickly loses vital functions.
35. The brain can process images in just 13 milliseconds – This is an incredibly fast reaction time, allowing us to quickly recognize our surroundings.
36. We have about 2 million sweat glands – Sweat is produced by millions of glands, mostly located on the hands, feet, and under the arms.
37. Our eyes stay the same size from birth – While the rest of our bodies grow, our eyes are one of the few organs that don’t increase in size.
38. We’re about 1 cm taller in the morning than in the evening – The intervertebral discs in our spine compress during the day due to gravity, making us slightly shorter in the evening.
39. The human brain can hold about 2.5 petabytes of data – The brain has an estimated memory capacity of about 2.5 million gigabytes.
40. Everyone has a unique smell – Every person has a specific smell, resulting from a unique mix of genetics, skin bacteria, and diet.
41. Humans are the only mammals that can cry when they are sad – While other animals produce tears, only humans can cry as an expression of emotion.
42. We produce about 25,000 liters of saliva in our entire lives – That’s enough to fill two large swimming pools.
43. The human eye blinks an average of 20 times per minute – Blinking helps to moisten the eye and also protects it from dust and other contaminants.
44. The brain can generate images even when the eyes are closed – This phenomenon is known as phosphene images, which can be created even without external light.
45. The human eye can distinguish about 500 shades of gray – Although we often associate the eye with color recognition, it is also extremely sensitive to differences in shades of gray.
46. The human body naturally produces small amounts of alcohol – Through fermentation in the digestive system, the body can produce microscopic amounts of ethanol.
47. The human body contains about 37.2 trillion cells – While this is just an estimate, it shows how complex and multifaceted our body is. Each of these cells has a specific role, working in intricate harmony to keep us alive.
48. Fingerprints develop around 10 weeks of pregnancy – They are unique and remain unchanged throughout life.
49. A person can detect the scent of another person’s sweat from a distance – This is due to our ability to recognize pheromones and other chemical signals.
50. People are divided into four basic temperament types – Theories of temperament, such as Galen’s, classify people as sanguine, choleric, melancholic, and phlegmatic, based on differences in brain chemistry.