Until what age did one American live, in fact, remaining a one-year-old baby? Detailed answer

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Until what age did one American live, in fact, remaining a one-year-old baby? Detailed answer

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Until what age did one American live, in fact, remaining a one-year-old baby?

Born in 1993, American girl Brooke Greenberg lived to be 20 years old, but in her physical and mental parameters she remained an infant. Her peak height was 76 cm, weight - 7 kg, mental development corresponded to a child of 9-12 months. Medical tests showed that there are no mutations in her genes responsible for aging. Scientists hoped to use the research of this girl to get closer to understanding the causes of aging in people, but in 2013 Brooke died of bronchomalacia.

Authors: Jimmy Wales, Larry Sanger

Random interesting fact from the Great Encyclopedia:

What is cellulose?

The soft part of plants and animals mainly contains cellulose. Cellulose is what gives plants flexibility.

Almost all green plants produce cellulose for their needs. It contains the same elements as sugar, namely carbon, hydrogen and oxygen. These elements are present in air and water. Sugar is formed in the leaves and, dissolving in the juice, spreads throughout the plant. The main part of the sugar goes to promote plant growth and restoration work, the rest of the sugar is converted into cellulose. The plant uses it to create the shell of new cells.

Cellulose is one of those natural products that is almost impossible to obtain artificially. But we use it in different areas. A person receives cellulose from plants even after their death and the complete absence of moisture in them. For example, wild cotton is one of the purest forms of natural cellulose that humans use to make clothing.

Cellulose is part of the plants used by humans as food - lettuce, celery, and bran. The human body is not able to digest cellulose, but it is useful as "roughage" in his diet. In the stomach of some animals, such as sheep, camels, there are bacteria that allow these animals to digest cellulose.

Cellulose is a valuable raw material from which a person receives various products. Composed of 99,8% cellulose, cotton is a wonderful example of what man can produce from cellulose fibre. If cotton is treated with a mixture of nitric and sulfuric acid, we get pyroxylin, which is an explosive.

After various chemical processing of cellulose, other products can be obtained from it. Among them: the basis for photographic film, additives for varnishes, viscose fibers for the production of fabrics, cellophane and other plastic materials. Cellulose is also used in the manufacture of paper.

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Random news from the Archive

Established the connection of odors with memories 06.08.2018

Neuroscientists at the University of Toronto have described how the brain works to form vivid memories that include smells and associated associations.

The process of forming complex memories is associated with the interaction of the hippocampus and the anterior olfactory nucleus (anterior olfactory nucleus, AON), located in the forebrain. The hippocampus is responsible for the consolidation of memories, that is, the process of their transition from short-term memory to long-term memory. The hippocampus also provides spatial memory - stores information that allows you to navigate the terrain. AON plays an important role in the perception of aromas, but remains poorly understood.

To investigate the role of the AON and the hippocampus in memory formation, the authors of the new work used the tendency of mice to carefully sniff unfamiliar odors and pay little attention to familiar odors. When mice forget a certain smell, it again begins to arouse interest in rodents.

During the experiments, the animals were placed in cages containing containers with various flavors: the smells of garlic, banana, coffee, and other products. At the first stage of the experiment, the mouse was placed in a cage with two containers with different odors, then the animal was placed in a medium with two identical samples. Rodents, in which scientists artificially "turned off" the neural pathways connecting the AON and the hippocampus, studied both duplicate odors for the same length of time - they did not remember the first sample. The control group of mice quickly identified the repetition and did not pay attention to the second container.

In the following experiments, mice were attracted not only by the novelty of the smell, but also by the changed position of one of the containers or the new sequence of containers in the room. At the same time, rodents with damaged connections between the AON and the hippocampus still did not notice the difference between the new and old environments.

Earlier studies have shown that loss of the ability to distinguish smells may be one of the early symptoms of Alzheimer's disease, and AON is rapidly degraded in the early stages of the disease. The new data can be used to create more effective diagnostic tests.

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