On which flag could you see a three-headed eagle? Detailed answer

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On which flag could you see a three-headed eagle? Detailed answer

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On which flag could you see a three-headed eagle?

When the issue of the collapse of the USSR was being decided, the Leningrad City Council of People's Deputies adopted on June 28, 1991, a draft of a new charter for the city of Leningrad. Among other things, the symbolism of the city was also proposed in this document. The described flag was a white-blue-red cloth with a three-headed eagle placed in the center - different heads symbolized the legislative, executive and judicial branches of power.

Authors: Jimmy Wales, Larry Sanger

Random interesting fact from the Great Encyclopedia:

How many galaxies are visible to the naked eye?

Five thousand? Two million? Ten billion?

The answer is four, although from where you are now sitting, only two are visible, and one of them is the Milky Way (in which we are located).

Considering that the universe is estimated to have over 100 billion galaxies, with 10 to 100 billion stars each, this answer is a little disappointing. And yet it is a fact - only four galaxies are visible from the Earth with the naked eye, and only half of them can be seen at the same time (two from each hemisphere). In the North - the Milky Way and Andromeda (M31), in the South - the Large and Small Magellanic Clouds.

Some citizens with phenomenal vision claim to be able to see three more: MZZ in the Triangle, M81 in Ursa Major and M83 in Hydra, but this is extremely difficult to prove. The number of stars supposedly visible to the naked eye varies widely, but everyone agrees that the total is well below 10. 000. Other estimates range from 9600 to less than 8000.

There was once a joke that there were more cinemas in the former Soviet Union (about 5200) than there were stars in the night sky.

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Human liver grown in mouse head 05.07.2012

The scientists implanted liver tissue made from human skin stem cells into the head of a mouse and grew a tiny organ that already performs many of the functions of the liver. Scientists at the University of Yokohama have grown a tiny human liver inside a mouse. It remains to be seen whether the grown organ can perform all the functions of the liver, but if so, then medicine will have huge opportunities for unlimited production of donor organs.

In their work, the researchers used induced pluripotent stem cells from human skin, which developed into hepatic tissue progenitor cells. The scientists then added two more cell types - mesenchymal cells and vascular endothelial cells. As a result, without any scaffolding and scaffolding, the cells independently formed normal liver tissue about 5 millimeters in size. This tissue was then implanted into the head of a mouse, and the rodent was able to absorb some of the drugs that only the human liver can handle.

Thus, for the first time, it was possible to create a functional organ with a vascular system from stem cells, which opens up great prospects in transplantology. The cultured liver tissue was transplanted into the head of the mouse so that increased blood flow in this area could stimulate accelerated liver growth. Within just 48 hours, the tiny liver began to form human blood vessels and produce human proteins. The levels of glycogen and amino acids in the tissues were the same as those found in the human liver.

So far, the grown liver is not a perfect copy of the human one. Some "details" are missing, such as the bile ducts. It is also necessary to solve the problem of forming a large body of the correct form.

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