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Where are the most wild camels? Detailed answer

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Where are the most wild camels?

Very few camels have survived in the wild. And most of them are in Australia. At one time, they helped to develop the vast desert territories of the fifth continent - about 5 million km2. Now there are 600-800 thousand camels. These animals cause significant damage to the ecology of Australia, destroying the ecological balance of the deserts.

Author: Mendeleev V.A.

 Random interesting fact from the Great Encyclopedia:

Is it true that the nightingale only sings at night?

Poets have not dedicated as many lines to any bird as to a nightingale. His singing is considered the most beautiful, and no one has yet been able to describe it well enough. By the way, the first attempt to do this belongs to the ancient Greek playwright Aristophanes! According to the poets, the nightingale sings only at night at almost any time of the year. But it's not. The nightingale is a migratory bird, and in England, for example, its singing can only be heard from mid-April to mid-June. The nightingale does not fly to Ireland, Wales or Scotland.

In continental Europe, nightingales are especially numerous in the south, and they reach Iran, Saudi Arabia, Ethiopia, Algeria and Ghana in western Africa. Only male nightingales sing. His song is an expression of courtship for his girlfriend, who sits silently on a bush or tree somewhere nearby.

The singing of the nightingale can be heard day and night, but during the day it is not very audible because of the voices of other birds. The nightingale sings until the female hatches the chicks. Then he falls silent so as not to attract enemies to the nest. He is always on the alert and makes short exclamations that tell his girlfriend that all is well, or warn of danger.

Although the nightingale sings the most beautiful songs, its plumage is very plain. Males and females are very similar to each other - a reddish-brown back and a dull gray-white abdomen.

The nightingale's nest has a somewhat unusual appearance. It is located directly on the ground or low above it. Outside, the nest consists of vertically arranged leaves. In the middle of this structure is a deep bowl-shaped depression, neatly lined with fibers from the roots of plants. It is built fragile and can be destroyed from one touch. It contains four to six dark olive eggs.

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Periodic vibrations of an unknown nature found inside neutrons 14.11.2021

Scientists working with China's BEC-II particle accelerator have found evidence that periodic oscillations of an unknown nature exist within neutrons.

The measurements showed that the electromagnetic structure of the neutron changes in a periodic manner. Something similar was previously recorded for protons. Subsequent experiments and theoretical calculations will help us understand how these oscillations arise and what role they play in the structure of nucleons.

Almost all elementary particles are made up of small objects that physicists call quarks and gluons. There are three quarks in protons, neutrons and other "heavy" baryon particles. Their smaller "brothers" - mesons - consist of two similar components, one of which is an antiquark, the basic component of antimatter.

Scientists have long been trying to understand how quarks are distributed inside protons, neutrons and other particles, as well as to study how they interact with each other and with the "sea" of virtual quarks, continuously appearing and disappearing at any point in space. All of these interactions, as scientists suggest, affect the structure of particles, their size, mass and other properties, the results of measurements of which sometimes do not coincide with theoretical predictions.

Physicists led by Professor Yuan Changzheng of the Institute of High Energy Physics (China) discovered an unusual property of neutrons while studying their structure at the BEC-II particle accelerator. Scientists collided beams of electrons and positrons and observed the formation of pairs of neutrons and antineutrons, which periodically arise as a result of the interaction of particles of matter and antimatter. The speed, energy and direction of motion of the neutrons and antineutrons generated by them depend on their internal structure, which was used by physicists for ultra-precise measurements of the distribution of quarks inside these particles.

The researchers have been observing collisions of electrons and positrons for several years, which allowed them to improve the accuracy of measurements of the structure of neutrons by about 60 times compared to previous experiments. The improvement in the quality of the data has revealed a curious phenomenon that physicists have already encountered several years ago when studying the structure of protons.

Back in 2013, scientists working with the BaBar installation discovered evidence that there are some fluctuations inside protons that affect the nature of the charge distribution inside it. The exact nature of this phenomenon is still a mystery to physicists, since the existence of these oscillations is not predicted by any theory describing the interactions of quarks.

Something similar, as Yuan Changzheng and his colleagues found out, occurs inside neutrons, and the oscillations inside them turned out to be opposite in phase compared to their counterpart inside protons. As the scientists hope, subsequent experiments on BES-II and other particle accelerators will help to reveal the nature of these oscillations and understand what role they can play in the behavior of neutrons and protons.

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