Is the speed of light the limit of speed? Is your body your own? We would think that the answer is yes, but these scientific facts that we believe in are wrong!
Let’s take a look at these 5 false scientific “facts” below.
The speed of light cannot be surpassed
Einstein’s theory of relativity tells us that the speed of any object cannot exceed the speed of light. But this only happens in a vacuum or close to a vacuum. Under special circumstances, the tortoise may crawl to win the game. All this depends on the Ding media.
When light passes through glass or water, its speed will slow down by about one-third, but this speed is still very fast. However, if you have a world-class laboratory that can create special obstacles, with the cooperation of the most cutting-edge technology, you can greatly reduce the speed of light, and even stop light from spreading within a short time. Scientists have now been able to slow down the speed of light by 48 kilometers per hour, and even use a special body to stop light from spreading for 1 minute. In this case, almost any object will move faster than the speed of light.
However, if the speed of light is not reduced, is there anything faster than light? Quantum entanglement is definitely the best choice. In the phenomenon of sub-entanglement, no matter how far apart two particles are entangled, the behavior of one particle can affect the other particle instantly.
Therefore, if you say that the speed of light is the limit of speed, you still score occasions!
The artificial earth satellite was the first man-made object to fly into space
Sputnik 1 was the first artificial satellite launched by the Soviet Union on October 4, 1957. It was the first man-made object to orbit the earth. We would take it for granted that this man-made satellite was the first man-made object to fly into space, but this is not the case.
Here, we need to first understand what “space” is. Space is simply the Ningxiao space outside the earth’s atmosphere. But in fact, the outermost atmosphere of the earth is floating outwards, so there is no clear boundary between the earth’s atmosphere and the outer space. In recent years, scientists usually call the space 100-110 kilometers away from the lowest orbital altitude limit of artificial satellites.
As early as during the Second World War, several man-made objects had flown across the boundary between the earth and space. They were the V-2 missiles developed by Germany. The maximum flight altitude of this kind of missile exceeds 100 kilometers, but they do not fly around the earth, but move along the parabola for a short time and then reach the ground. Although the V-2 missile claimed the lives of many people in World War II, after the war, the technology of the V-2 missile was used to operate rockets and made important contributions to the advancement of human space.
Glass is a liquid
If we visit some ancient churches in Europe, we will see exquisite and ancient glass windows. But unlike the current glass, the old glass looks thin at the top and thick at the bottom. Someone may tell you that this is because glass is liquid, so after a few centuries, under the action of gravity, the glass flows downwards and eventually thickens at the lower end. It sounds convincing, but in fact, this is just a myth.
In fact, glass is not a liquid, but it is not the same as an ordinary congruent. It is an undefined congruent. In terms of microstructure, glass does not have a regular character arrangement. The arrangement of atoms, ions, and molecules is an irregular arrangement similar to a liquid.
The thicker bottom of the ancient glass is caused by the manufacturing process and installation. Early glass manufacturing technology could only produce small pieces of glass, and each piece of glass had different thickness and transparency. In order to conceal the imperfections of these glasses, the craftsmen will try to make them more consistent when installing them—the thick end is below and the thin end is above. From the perspective of load-bearing, the thick end underneath can also protect the glass from breaking to a certain extent. This is why the lower end of the glass on the old window is thicker.
Fish are the first animals to live on land
About 365 million years ago, a particularly brave fish learned how to stay on land for a short time. As time goes by, it stays ashore longer and longer. Gradually, its gills gave way to the lungs, and the first two animals appeared, then reptiles, birds, and mammals evolved, and then humans. So we often say that life originated in the ocean.
So was the brave fish the first animal to live on land? Obviously not. In the late Devonian period when fish marched to land, other animals including insects and millipedes were already living on land. However, this fact is often overlooked by us.
Your body is entirely your own
It may be a bit scary to say-the human cells in your body are not necessarily your own. During pregnancy, many mothers and fetuses exchange cells through a process called microchimerism. Fetal cells enter the mother’s body through the placenta. These cells divide normally in the mother’s body and eventually differentiate into the mother’s tissues and organ cells. However, the genetic information of tissues and organ cells differentiated from fetal cells is different from the mother’s own cells. Such “residues” can be passed on to other babies born to mothers, and even to the next generation of these children. So your grandmother’s cells may be wandering in your belly, and some of your uncle’s cells may also be sealed in your spleen.
What’s even more creepy is that about half of the cells in your body are not human cells, they belong to bacteria, fungi and archaea. Your body is full of these little invaders. There are 500 to 1,000 such species that make their homes in the folds, ducts, and chambers of your body, each of which is in the tens of trillions.