If the question is how to deflect projectiles without skyrocketing military costs, China has found the solution: crocodiles

In recent years, the US military has even tested fibers inspired in spider silk for future bulletproof vests. The reason was simple: some natural materials achieve absorb impacts and deform better than many modern artificial compounds. The idea of ​​using animals. The search for more effective shielding has been inspired by natural solutions for decades. Since the Second World War, different armies have studied biological structures capable of absorbing impacts, distribute energy or resist attacks better than expected. China has just joined this tradition with a peculiar proposal: armor inspired by the crocodile scales. The logic behind the project is simple. Instead of relying solely on making armor thicker, heavier and more expensive, researchers are trying to modify the way projectiles hit the surface to force them to deflect, lose stability and fragment before passing through. How it works. The Ningbo University team replaced the traditional hexagonal plates used in many armors composed of small rhomboidal ceramic pieces placed at 45 degree angles. The arrangement imitates the irregular, overlapping structure of crocodile scales. During testing, the design was able to more effectively reduce the residual velocity of hardened steel projectiles and increase fragmentation of the ammunition upon impact. The objective is not only to withstand the shot, but to alter the physical behavior of the projectile at the moment of contact so that part of its energy is lost before reaching the main armor. The obsession with reducing costs. The most relevant thing about the project is not only the additional protection, but the attempt to make it cheaper. Chinese researchers they insist in that any structural improvement that allows the same materials to be used with better results can greatly reduce the manufacturing cost. There is no doubt, this obsession makes a lot of sense in modern warfare. Shielding vehicles, helicopters or troops against increasingly powerful ammunition requires enormous amounts of advanced materials and gigantic budgets. From that perspective, if a relatively simple geometric modification achieves better results without increasing weight or industrial complexity, the economic impact can be enormous on a large scale. Logic born of recent wars. If you like, the Chinese research also reflects a broader change that is already seen in Ukraine and other recent conflicts: it is increasingly important economic efficiency of weapons and defenses. For years, military innovation was dominated by extremely sophisticated and expensive systems. Now many countries are looking for solutions that are sufficiently effective, easy to manufacture and sustainable in long wars. In this sense, Russia already demonstrated how relatively simple glider bombs could cause enormous problems at low cost. Ukraine responded with cheap drones capable of destroying much more expensive equipment. The shielding crocodile inspired fits perfectly into this new logic: trying to unbalance the relationship between cost and effectiveness without having to resort to futuristic technologies that are impossible to mass produce. Future battlefields. For now, the Chinese system remains in the experimental phase and still needs much more demanding tests, including multiple impacts and firing from different angles. Still, researchers believe it could end up being used in armored vehicles, helicopters, ships and even light aerospace structures. What is interesting is that China does not present the project as a spectacular technological revolution, but rather as a pragmatic improvement based on simple principles. geometry and materials. An idea that pretty well sums up where part of current military innovation is heading: less obsession with creating impossible weapons and more interest in find smart ways and relatively cheap to survive in an environment where each projectile and each armor cost more and more money. Image | David Shackelford, PXHere, Unsplash In Xataka | China is manufacturing missiles at an unprecedented speed. And the final objective is not Taiwan, it is another island 3,000 km away In Xataka | China has made a science fiction dream come true: an electromagnetic cannon capable of reaching 3,000 shots per minute

Darwin is an Australian city with 250,000 inhabitants. 100,000 of them are protected crocodiles

Australia is a peculiar country. Not so much for their culture, a mixture of indigenous and western customs, but because it has become in the eyes of the rest of the world into practically, A meme. And it is due to the curious variety of fauna with which he has a recurring joke that Any bug That you find yourself It will be huge and You can kill you. Among them, are the crocodiles, which are not so exotic, but they have a whole town. The town is Darwin, and the 100,000 crocodiles that surround it are of a fairly aggressive species. Irony. You may be thinking about it, and that is: Darwin It is called in honor of the Naturalist Charles Darwin. It was founded in 1869 and, in its short history, it has had to be rebuilt on a couple of occasions. One, due to a Japanese bombing during the Second World War. The other by the action of a cyclone. It has 150,000 inhabitants and is the most populous capital in the north of the country, but much of its population does not walk on two legs. Larrakia. Darwin is located in a privileged enclave for outdoor sport, especially for those who enjoy sea sports. However, that exposure to the sea and one of the few rivers in the country has a small print: a population of overwhelming crocodiles. Currently, it is estimated that there are more than 100,000 crocodiles around the town, but until not long ago, the situation was completely different. The Larrakia are the aboriginal inhabitants of that region and, for 65,000 years, they lived with the crocodiles. The reason? Double: spiritual and useful. They were revered, but because they were of great value to the people due to their flesh and eggs. These crocodiles are of a particularly aggressive species, salt water crocodiles or Crocodylus porosusand his fate changed in the mid -twentieth century. Challenge. After World War II, the Larrakia painted little in a more westernized territory, and the crocodiles began to be dough hunted not due to their flesh, but to their skin. The fashion of the mid -century prevailed and imported little end with entire animals, which reduced The population of crocodiles between 3,000 individuals for the 60s. That hunt was seen as a form of economic development due to the lucrative fashion business, but things changed in the 70s. The little girl. In 1971 I know They implemented conservation policies, preventing the hunt for crocodiles and the population … exploded. If only 3,000, in 50 years they have multiplied until reaching 100,000 copies. Due to the numerous coast and warm temperatures, the territory of northern Australia is an ideal habitat for these crocodiles and, although they are an aggressive species, in recent years there have been less mortal incidents we could think. And, because the area is ideal for both fishing and swimming, or to perform any other outdoor activity, Darwin has a system of traps and park rangers that are responsible for keeping crocodiles at bay. Especially in times of heat, when these reptiles are more restless. Shield. Kelly Ewin is one of these park rangers, whose work is to catch and remove crocodiles from the areas closest to the population. In BBC He says that there is a system composed of 24 traps that surround the city of Darwin and are designed to catch those who approach too much, especially in the port area. “Obviously, we are not going to capture all the crocodiles, but the more we take out the port, the less the risk of a meeting between crocodiles and people will be,” says this former policeman. In addition, another tool is population education. In the northern territory, the government launched a program called “Be wise around crocodiles” to teach people how to behave responsible in the habitat of these animals. Natasha Hoffman directs the program and comments that, living in a country of crocodiles, they must know the answer to how to behave if they cross one. “If you are on a ship when you are fishing you must be aware that the crocodiles are there. They hunt through ambush, they sit, observe and wait. If they have the opportunity to grab some food, that is what they are going to do,” says the educator. There are also these poor people with a bad reputation due to ‘Jurassic Park’ License to kill. Now, although in the northern territory it is not allowed to kill the crocodiles massively due to that protection, but plans have been approved to increase the quota of crocodiles that can be killed annually from 300 to 1,200 with the aim of controlling the population. In addition, when there is a potentially dangerous encounter between a crocodile and a human, the park rangers have permission to end the threat. The problem is that there are too many, they are aggressive if a human approaches too much and, as they expose in BBC, every time a death occurs, the debate that puts the possibility of mass killings is revived. There are politicians who take advantage of say That the population is out of control, something that not everyone agrees. Business. Because not only local die: also tourists. In the same report, Alex Williams is the captain of a cruise focused on the viewing of crocodiles and states that there has been a boom of tourists in the last ten years. In addition, there are impracticable rivers. “If you are going to swim to the Adelaide River next to Darwin, there is a 100% chance of killing you. The only question is whether it will take five minutes or ten. I don’t think you never get to fifteen, you’ll end up shattered,” says Grahame Webb, an expert in these crocodiles. However, there are attractions like the ‘Cage of Death’ that allows you to swim with giant crocodiles. And, apart from tourism, there is a Intensive breeding of crocodiles that spend their lives … Read more

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