Cockroaches: The most survivable animal in history. Cockroaches have appeared on the earth 300 million years ago, and their appearance has not changed much. However, the cockroaches living in the Americas today are longer. About 1.5 inches, but this ancient cockroach is 3.5 inches long. As more and more information about cockroaches was collected, Li Shunan became more and more curious about cockroaches. What other unknown secrets did cockroaches have? Maybe you have had this experience. You found a cockroach in your home. You stepped on it and saw that it was dead. However, when you looked for its body again later, you found that it was gone. Where did it go? You may not think that it escaped again! Super vitality According to the British Mirror, the cockroach has a very strong regeneration ability. Not only can it escape quickly after being injured, it can also survive for nine days even after it is beheaded. A British scientist once conducted a related experiment. He cut off the head of a pregnant female cockroach. After a while, he found that the cockroach originally placed on the test bench was gone, so he rummaged around. Finally, he finally found the headless cockroach in a wastebasket. At this time, he found that the cockroach was still alive. Not only was it alive, but it also gave birth to several small cockroaches. As we all know, nuclear radiation can destroy almost all living things. A newly discovered creature breaks this view. Scientists from Japan's Kanagawa University found in research that bear insects can survive under a pressure of 600 million pascals. This pressure is 6,000 times the atmospheric pressure, which is higher than that of most organisms. , including twice the pressure limit that bacteria can withstand. The study also found that the bear bug can survive in a temperature range of minus 253°C to above zero 151°C, and its life will not be harmed if it is placed in a vacuum or X-ray environment. Scientists point out that further understanding of the mechanism by which bear worms withstand various extreme conditions will help to find new methods of preserving human organs for transplantation.