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By jsyeem shekelsPublished 2 years ago 2 min read

World Health Organization (WHO): Omicron subvariant strain BA.2 spreads more easily.


The discovery of the largest radio galaxy to date.

Radio galaxies are galaxies that emit strong radio radiation. they contain a host galaxy in which supermassive black holes act as active galactic nuclei.

Huge jets and lobes erupt from the galactic nucleus, which interact with the intergalactic medium to synchronously accelerate electrons and produce strong radio radiation.

Astronomers do not know why some radio galaxies can grow to a huge size, with a gap of millions of seconds, and the discovery of examples of such giant radio galaxies will help astronomers understand.


Chinese scientists establish a new lunar chronological function model.

In the past, researchers have established a statistical dating method for impact craters based on samples collected on the lunar surface by early Apollo and lunar missions.

However, the ages of the samples collected by the Apollo and Lunar missions have a long gap between 3 billion and 1 billion years, accounting for almost half of the moon's geological history.

The isotope dating results of Chang'e-5 return sample show that its age is 2.03 billion years, which fills this gap.

Based on the results of impact crater statistical analysis and impact crater yield function of high resolution lunar remote sensing images, the research team updated the most widely used Neukum chronological function, and thus established a new lunar chronological function model.

Next, according to the new lunar chronological function, the new chronological functions of Mars, Mercury and other extraterrestrial planets can be deduced to improve the dating accuracy.

(Xinhua News Agency).


Will checking your cell phone before going to bed really affect your sleep?

The time and quality of sleep will affect people's physical and mental health.

Early studies have shown that a very important factor leading to sleep problems is the use of browsing media (such as watching TV, browsing videos, browsing the web, etc.) before going to bed.

A new study published in the Journal of Sleep Research found that the use of browsing media before going to bed is not necessarily harmful to sleep.


The Antarctic IceCube has not found a magnetic monopole for eight years.

Theoretical physics assumes that the Big Bang produced elementary particles with only a single magnetic pole, the magnetic monopole.

According to theory, when a magnetic monopole passes through the ice, it produces Cherenkov radiation and can be detected by the IceCube sensor at the South Pole.

However, IceCube has not yet picked up the relevant signal, but the search for magnetic monopole continues.

IceCube's 5000 sensors were originally designed to detect Cherenkov radiation emitted by neutrinos as they pass through the ice, as well as when magnetic monopole interacts with ice.

To this end, scientists have developed a machine learning model to find the characteristic Cherenkov radiation signal of the magnetic monopole.

Unfortunately, the IceCube has not been able to detect magnetic monopole signals in the past eight years (2886 days).

However, scientists have fine-tuned the search method based on data analysis, setting a stricter upper limit on the possible flux of magnetic monopole.

The study was published this month in the physical Review KuaiBao.


Knowledge accumulated by the elderly can interfere with memory retrie


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    jsyeem shekelsWritten by jsyeem shekels

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