When did the prologue appear At the Lukomorye the green oak...? Detailed answer

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When did the prologue appear At the Lukomorye the green oak...? Detailed answer

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When did the prologue appear At the Lukomorye the green oak...?

Pushkin wrote the prologue "At the Lukomorye a green oak ..." of the poem "Ruslan and Lyudmila" for its second edition, released 8 years after the first publication.

Authors: Jimmy Wales, Larry Sanger

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What is the Rh factor?

When a person loses a lot of blood for one reason or another, his life can be saved by a blood transfusion. Another person's blood flows into the victim's circulatory system and replaces their own lost blood.

The first known blood transfusion was performed in 1677, when the blood of a lamb was poured into the veins of a dying boy. This boy was lucky and survived. We now know that the blood of lower animals is different from human blood, and its use in human transfusions involves great risk.

In 1940, another method of dividing blood into groups was discovered - depending on the Rh factor. This discovery was made in the course of experiments on rhesus monkeys, and therefore this phenomenon was called "rhesus". It has been found that with certain mixtures of blood, red blood cells rupture. This is due to the difference in the Rh factor. There are two types of human blood: Rh positive and Rh negative.

If blood from a Rh-positive person is transfused to a Rh-negative person, the latter will develop a disease when the same blood is transfused again. In rare cases (one in forty or fifty) from a father with a positive Rh and a mother with a negative, under certain conditions, a child is born with a blood disease.

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Flood protection of the Maldives 19.03.2023

To protect the Maldives from flooding, you need to increase their height in relation to sea level by six times, say scientists from the University of East Anglia.

Scientists have put forward a proposal to raise the Maldives above sea level by about 6 meters in order to protect them from possible flooding due to the continuous melting of glacial masses.

Embankments and the construction of new islands on the archipelago will help raise the Maldives. The state will not be able to do without such a reconstruction, according to scientists, because 80% of its coastal surface is no more than 1 meter above sea level.

In order to raise every 100 hectares of the islands, you need to invest at least 8 million dollars. The Maldives has 1196 islands with a total area of about 297 sq. km.

A new island has already been created in the Maldives, which was named Hulhumale. It is built from sea sand.

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