Immortality is something that human beings have been pursuing since ancient times. Is there really immortality in the world? Now, I’d like to introduce a kind of microorganism related to immortality — water bear.
In 1937, scientists discovered for the first time that the water bear has an adult posture as soon as it hatches. Compared with the adult water bear, the difference is that the newly hatched water bear is smaller. This is not true of many arthropod relatives of the water bear, whose posture in childhood is significantly different from that in adulthood. For example, maggots turn into flies and caterpillars into butterflies. The water bear needs to peel many times in its life to adapt to its bigger body, but its posture remains unchanged throughout its life.
Water bears are very small, ranging from 50 microns to 1.4 mm, but most of them do not exceed 1 mm. Although they are very small, they have eight feet, a head, eyes, a mouth, and a complete hair digestive system. They are hermaphrodites that develop directly from eggs.
Seeing this, do you wonder how we know that water bears are immortal?
At the end of the 18th century, scientists found that water bears were found in the cold polar regions and in the arid and hot deserts.
Rahm of Freiburg University in Germany once placed the water bear at 150 ℃ and – 200 ℃ respectively, and then placed it at room temperature to give water, and it miraculously revived.
Gy is the unit that absorbs radiation. For human beings, absorbing 5 Gy of radiation will lead to death. However, the water bear can absorb 5700 Gy of radiation and still be at peace. So we can know that the anti radiation ability of water bear is 1000 times that of human beings, and it can live well under the condition of nuclear radiation.
At present, human beings have not found any living things can survive in a vacuum environment, because if we want to survive in a vacuum, the pressure is a big problem. Because living things can explode under too much pressure, but water bears don’t. The water bear can’t flatten the deepest known Mariana Trench at six times the water pressure. It can withstand 75000 atmospheres and has super vitality.
Later, humans brought the water bear into space. As we all know, the space environment is very bad, and there is no sign of life in space. The researchers put the water bear bug in a small bottle, made several holes in the bottle, and let the bottle float in the space environment. A week later, they retrieved the bottle and found that the water bear bug was still alive.
So it’s called the strongest creature on earth.
Why don’t water bears die?
Protein accounts for more than 80% of the solid components in cells. Protein is an important component of biological cells. It plays a core role in the biological system and is the main undertaker of life activities. It can be said that there is no life without protein. And in the environment above 100 degrees Celsius, almost no living things can survive. Because the protein will coagulate at high temperature, once it solidifies, it will die, but the water bear protein will not solidify.
If the protein can survive alone, it will not solidify, because there is water, it will solidify. When the environment changes dramatically, the water bear will begin to contract its body, squeeze out all the air and water in its body, completely turn into stone, and enter a state of suspended animation. Once entering this state of suspended animation, no matter how bad the external environment is, the state of water bear can not be changed. When the environment gets better, the water bear will not revive immediately. It needs you to give it a drop of water. After absorbing water, it will revive from the state of suspended animation.
Xiaobian thinks that if we can figure out how the water bear is resurrected from the state of suspended animation, then maybe human beings can also achieve suspended animation and immortality.
What do you think of this? Welcome to comment area.