For example, if a corpse is buried directly in the soil, it will attract the bacteria in the soil, and the bacteria will multiply in large numbers, causing the corpse to rot. Generally, the soft tissue of a corpse will rot and blend into the soil within 2-3 years, leaving only bones at last. Others bury their bodies in coffins, which can isolate the outside air and prevent insects from eating, so the speed of corruption will be slower. In addition to being buried in the soil, some bodies are directly exposed to the wild. If it happens to be summer, it is estimated that the fly will run to lay eggs 20 minutes after death, and it will rot to the bone after about a week or two.
bone
There are also some bodies placed in special circumstances, such as climbers killed on Mount Everest. Because of the low temperature, the whole body is frozen, and due to lack of water, it will eventually shrink into a mummy. And in the desert, it is very dry, and the body will quickly dehydrate and air-dry and become a mummy. Of course, if you send it to the cremator after death, it will become a bone in less than an hour! If some bodies are soaked in formalin, it is estimated that they will not become bones for decades. Proper humidity and moisture are also one of the necessary conditions for the growth and reproduction of spoilage bacteria. If the air is dry and well ventilated, the water in the corpse will evaporate quickly, which is easy to form mummies and corruption can be stopped.
white bones
The initial stage of air corpse corruption is mainly the role of aerobic bacteria, so the ground corpse exposed to the air with sufficient oxygen supply has a faster progress; Due to the limited dissolved oxygen, the decomposition of the body in water progresses slowly; Due to lack of oxygen, the corpse buried in water decays the slowest. Generally speaking, obese people are thinner and children are more corrupt than the elderly; Large-scale trauma, burns, easy invasion of bacteria, rapid progress of corruption; The blood of a corpse with suffocation, electric shock and sudden death is intact and flowing, which is beneficial to human blood and leads to rapid corruption. On the contrary, the opposite is true.
So generally speaking, how long a person becomes a bone after death is influenced by many factors.