On December 29, 2015 (November 19, 2015 lunar calendar), a large number of giant spiders were found in Antarctica. According to a report in the British "Daily Mail" on December 29, this kind of creature lives in the waters near the Arctic and Antarctica - a giant sea spider with eight long legs and a snout tube, with legs up to 25 cm long, making it the largest in the world. This sea spider is a primitive marine arthropod that can be found all over the world, but usually they are very small. But in polar waters, they can become much larger than in other places, a phenomenon known as "polargigantism". Although scientists have put forward many hypotheses, they cannot accurately explain the reasons. A team of researchers from the National Science Foundation, the University of Montana and the University of Hawaii believe that this may be due to the high concentration of dissolved oxygen in cold water. The extremely high oxygen concentration in seawater near the coast of Antarctica, coupled with the slowdown of metabolism in cold climates, makes it likely that spiders will grow particularly large. Scientists say that larger organisms need more oxygen to keep their bodies running. Scientists have used ice-breaking to take samples deep into the sea near Antarctica and tested them at different temperatures and oxygen concentrations. They found that low oxygen concentrations have a negative impact on sea spiders, which also supports their previous hypothesis. They believe that if this is indeed the cause of maximal disease, it will not only affect sea spiders, but also have implications for more large marine organisms. The Antarctic has a large number of mysterious giant spiders, and the reason for the "sperm" has stumped a large number of scientists. In the depths of the cold, dark polar oceans, terrifying creatures that give people nightmares are hidden. One such creature lives in the Arctic and waters near Antarctica - a giant sea spider with eight long legs and a snout tube. This sea spider is a primitive marine arthropod that is found all over the world, but in polar waters, they become larger than in other places. This phenomenon is called "polargigantism", but scientists cannot accurately explain why. There are a large number of mysterious giant spiders in Antarctica, and the reason for the "sperm" has stumped a large number of scientists. Usually, this type of spider will be very small, but a large number of such spiders discovered by scientists in Antarctica can reach a leg circumference of 25 centimeters. This kind of polarized megalomania will not only affect sea spiders, but some copepods, echinoderms or molluscs will also become larger in the polar regions. Scientists have also put forward many hypotheses about this, but unfortunately there has been no clear statement. A team of researchers from the National Science Foundation, the University of Montana, and the University of Hawaii believes that this may be due to the high concentration of dissolved oxygen in cold water. There are a large number of mysterious giant spiders in Antarctica, and the reason for the "sperm" is that a large number of scientists have stumped a large number of scientists. The extremely high oxygen concentration in seawater near the coast of Antarctica, coupled with the slowdown of metabolism in cold climates, makes it very likely that spiders will grow particularly large. Scientists say that larger organisms need more oxygen to keep their bodies running. Scientists have taken samples deep in the sea near Antarctica and tested them at different temperatures and oxygen concentrations. They found that low oxygen concentrations have a negative impact on sea spiders, which also supports their previous hypothesis. They believe that if this is indeed the cause of mega-disease, it will not only affect sea spiders, but also have implications for more large marine organisms. Only two families of spiders are non-toxic. Are spiders poisonous? The most primitive spiders in existence, the Liphistiidae family under the Chinese spindle suborder, and the Uloboridae family, which has a sieve device in the new spider family, have no venom glands. The former has not evolved, and the latter's venom glands have degenerated and disappeared. All spiders except these two families have a pair of venom glands, which means they are toxic. Toxins are the digestive juices of spiders, and some spiders are more toxic and can threaten humans. But due to the limitations of their physique, the amount of injection after biting is small, and unless it is an allergy, there are few that can threaten humans. Chinese spiders are not very toxic. But Chinese bird-catching spiders are very toxic! ( Hainan bird-hunting spiders, tiger-patterned bird-hunting spiders, Jingzhao tassel-haired spiders), so stay away from them when you see big furry spiders. Tarantulas are also more toxic, but they like to drill holes, you just don't dig them out. There are also spiders with metallic luster on their bodies or oily ones (such as Reye's warts) that generally have little effect on humans except for a few.