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How did lunar craters form? Detailed answer

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How did lunar craters form?

The ring mountains characteristic of the Moon, craters up to 300 km in diameter, probably arose as a result of the bombardment of the lunar surface by large meteorites. Some of the lighter colored craters are younger, only a few hundred million years old.

Author: Mendeleev V.A.

 Random interesting fact from the Great Encyclopedia:

What insects tend to compensate for love failures with alcohol?

American biologists, studying the mating behavior of male fruit flies, offered them a choice of two feeders - one contained ordinary sugar syrup, the other had the same, but diluted with alcohol. Those males whose courtship was rejected by the females drank from the trough with alcohol much more often. The reason for this was a reduced concentration in their body of a protein called neuropeptide F, which acts on the pleasure center of the insect - not receiving it due to lack of mating, the flies tried to fill the gap with alcohol consumption.

 Test your knowledge! Did you know...

▪ What property of Iapetus, the moon of Saturn, became one of the foundations of Arthur C. Clarke's famous novel "2001: A Space Odyssey"?

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Artificial muscle based on natural proteins 02.02.2022

Researchers from the University of Freiburg (Germany) have developed an artificial muscle based solely on natural proteins. Muscle contractions can be controlled by changes in the acidity of the environment and temperature.

The material the scientists used is based on elastin, a natural fibrous protein also found in humans that gives elasticity to the skin and blood vessels. Researchers have developed two elastin-like proteins, one of which responds to fluctuations in acidity (pH) and the other to changes in temperature. The scientists combined the two proteins using photochemical cross-linking to form a bilayer material.

So, in response to changes in the pH level in the aquatic environment where the material was placed, or temperature, the artificial muscle was able to contract rhythmically. In the case of temperature changes, the chemical reaction started at about 20 degrees Celsius. In this case, it was possible to program certain muscle states and reset them again with another stimulus.

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