11 mysteries that scientists still can’t explain
According to science, everything in this world has an explanation.
But it seems that certain facts and discoveries have upset these convictions. Even though scientists have already cleared up a number of problems, there are still some that give them a hard time.
Here are 11 fascinating mysteries that still hold secrets…for now.
1. How do cats purr?
Cats purr when they are happy, as well as when they are sick or about to die. That said, no one knows how this phenomenon occurs. Additionally, their purring is so powerful that it’s impossible to hear their heart beat.
According to the theory of scientists, purring emanates from the vocal cords of the animal. It seems that this sound has healing qualities: it speeds up healing and reduces pain. This is why cats tend to purr when injured or stressed. Of course, this is based only on suspicions, and there have been no studies yet that can prove these theories.
2. Where do certain creatures come from?
As strange as it may seem, it’s a fact: many species have no ancestors. For example, when did amphibians evolve from the fish stage? Most land animals already had well-developed limbs and heads.
According to what we learn from the history of mankind and the Earth, dinosaurs died out after the planet was pummeled by meteorites some 65 million years ago. But then, where did all the species of mammals (including man) that we know today come from?
3. Why do cows turn their heads to the north or south?
It's a fact, check it out if you need to! 70% of cows turn their heads to the north or south as they eat or drink. This has been observed on a large number of herds in all parts of the world, regardless of the weather, the time, the continent, etc. Scientists even conducted a study with Google Earth by to try and understand this fact.
4. What really happened in August 1994 in Oakville?
It was a summer day like any other in the United States. But on that day, the city of Oakville, Washington experienced an unusual event. Gelatinous rain fell from the sky. The substance was solid and flabby. The following day many of the town’s residents suffered from headaches, fevers, and other flu-like symptoms.
After analyzing the substance, scientists found that it had two types of bacteria, one of which is present in the human stomach. For the time being, nothing can explain this bizarre rain or the illnesses that followed it.
5. What is dark matter?
Although gray matter characterizes intelligence, dark matter concerns space-time in the universe, and it emits no electromagnetic radiation and therefore is not detectable. For now, scientists estimate that ??dark matter makes up 27% of the universe.
Although this theory first appeared in the 1960s, no scientist has yet been able to demonstrate the existence of such a phenomenon.
6. How many planets make up the solar system?
With the exclusion of Pluto, the solar system includes 8 official planets. Beyond Pluto, the Kuiper Belt is composed only of icy objects. But by doing research, scientists have also discovered many masses in that area that are even bigger than Pluto.
The strangest fact remains that there is a planet in the Kuiper Belt as large as the Earth, which has pulled many stones from the belt to itself.
7. Why are some people right-handed or left-handed?
Most humans are right-handed. Only 10% of the population is left-handed. An indeterminant number of people are ambidextrous.
It seems that genes are involved in determining whether a person will be right-handed or left-handed, but this theory does not really hold, because no "left-handed gene" can be identified. On the other hand, for years left-handers were considered diabolical because they were “different.” Thus, when a child was born and a few months later started showing a predisposition to become left-handed, their parents prevented them from being able to use their left hand. Hence the term "converted left-handers."
8. Why did megafauna become extinct?
The megafauna consisted of giant animals. From what we know, they totally disappeared about 10,000 years ago.
Only theories explain this extinction, such as climate change or even famine. But again, this theory was refuted when a mammoth was found in Alaska, with a stomach full of greens that had not yet been digested. Note that there is some information that it would also appear that giant people also lived on this planet. They also disappeared suddenly, after some of them were captured to be put on display at exhibitions of "extraordinary people" or "monsters" to amuse people.
9. Why and how do we dream?
Many scientists study dreams. For some of them, they are random images without any real meaning. For others, it is the subconscious at work.
Studying dreams is very complex, since they are produced by the brain (which never sleeps), while the rest of our body sleeps. Now the brain itself is still an unsolved mystery for scientists!
10. Where does the "space roar" come from?
It’s quite random that for the first time in 2006, scientists heard the "space roar." Before that, it had been proven that sound could not be transmitted in space. Only radio waves can be.
The only thing that researchers agree on is that this sound did not come from stars, waves, or any other known phenomena.
11. Why do people have different blood types?
The antigens in a person's body are antibodies whose role it is to destroy any foreign cell. Each type of blood contains one type of antigen. Having said that, nobody can explain why there are different kinds.
One theory suggests that certain blood types are more fragile than others. For example, type B blood is more sensitive to E. coli, Type O blood is more resistant to malaria and is considered compatible with all other blood types.
Source: businessinsider and BrightSide
By Straker Julia
Writer
Passionate about writing, I write articles on the subjects that I love. Creativity and Animals themes are my favorites!
