Why did announcers wear green lipstick in the early days of television? Detailed answer

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Why did announcers wear green lipstick in the early days of television? Detailed answer

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Why did announcers wear green lipstick in the early days of television?

In the era of black-and-white television, red filters were often used in cameras, due to which red lipstick made lips look pale on TV screens. Therefore, announcers and actresses were made up with green blush and lipstick.

Authors: Jimmy Wales, Larry Sanger

Random interesting fact from the Great Encyclopedia:

What is hemoglobin?

Most of our blood cells are red blood cells. Millions and millions of red blood cells circulate through the blood vessels. Red blood cells contain a protein called hemoglobin. Hemoglobin is a red pigment containing iron atoms. Our blood is red in color because it contains hemoglobin compounds with oxygen.

Hemoglobin has a more important function for the body than just turning blood red. It has the ability to form an unstable compound with oxygen. This ability allows red blood cells to carry oxygen throughout the body. Oxygen is part of the air passing through the lungs, and hemoglobin picks up oxygen molecules. Continuing their journey through the blood vessels, red cells carry oxygen to all cells of the body.

When an oxygen molecule is delivered to a cell of the human body, hemoglobin takes away a carbon monoxide molecule from it, which was formed there in the process of burning food by this cell. Then the red blood cell, loaded with a molecule of carbon monoxide, returns to the lungs, where an exchange takes place: carbon monoxide is detached and excreted from the body along with the exhaled air, and a new oxygen molecule is picked up in its place. The red blood cell then continues on its way to deliver that oxygen to the appropriate cell. That is why it is very important that our food contains iron. It stimulates the production of red blood cells and increases their hemoglobin content.

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New form of magnetism discovered 21.11.2023

A research team from ETH Zurich has announced the revolutionary discovery of a new type of magnetism. The experimental results indicate that an artificially created material can acquire magnetic properties through a previously unknown mechanism.

The experimental discovery of a new form of magnetism in moiré materials opens up new perspectives in understanding the magnetic properties of materials. The results obtained allow us to consider possible applications of this phenomenon in future technologies and the creation of new materials with unique magnetic properties.

A known form of magnetism, which occurs when magnets stick to refrigerators, for example, is called ferromagnetism and occurs when all the electrons in a material spin in the same direction. However, there are other forms such as paramagnetism, which is a less intense version and occurs when electrons spin in random directions.

In a new study, scientists from ETH Zurich investigated the magnetic properties of moire materials, experimental compositions created by incorporating two-dimensional sheets of molybdenum diselenide and tungsten disulfide. These materials have a lattice structure capable of containing electrons.

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The material initially showed signs of paramagnetism, but as more electrons were added to the lattice, it suddenly and unexpectedly transitioned to a state of ferromagnetism. Interestingly, this shift occurred precisely when the lattice contained more than one electron per site, excluding exchange interaction, the usual mechanism responsible for ferromagnetism.

Scientists have proposed an alternative mechanism: when more than one electron hits lattice sites, they combine into particles known as "doublons" that eventually fill the entire lattice through quantum tunneling. In the process, the electrons minimize their kinetic energy, aligning their spins and thus creating ferromagnetism. Such "kinetic magnetism" has been theorized for decades, but has not previously been seen in solid materials.

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