​A planet that simply shouldn’t exist has been discovered ● Another myth about male hunters is dispelled ● Who rejuvenates a person? Green plantations

A planet that simply shouldn’t exist has been discovered

When the sun reaches the final stage of its existence, it expands to 100 times its normal size. In this whole process, the sun absorbs the planets in its solar system, destroying them. Hence the surprise of researchers from two astronomical observatories in Hawaii, Maunakea and W. M. Keck, when they identified a planet that had survived this process.

The planet is called Halla (or 8 Umi b), it’s a Jupiter-type planet, and it orbits a red giant called Baekdu, about 520 light-years from our solar system. According to data obtained by specialists published in the journal Nature, the star has already used up its hydrogen in the core. This means that after it has gone through the expansion phase, it has shrunk to about 1/10 of its original size.

In theory, there shouldn’t have been any planets that were in the star’s expansion path. Yet Halla continues to exist at a distance of about 75 million kilometers from Baekdu, which is half the distance between Earth and the Sun.

Three hypotheses were put forward to explain the anomaly. The first states that Halla was originally at a much greater distance from its star, having somehow recently entered it. But in the conditions of the rapid expansion of the star, this hypothesis looks the least probable.

Another version states that the solar system in question actually had two stars, not one, and that the two stars merged, preventing the supposed expansion. Last on the list, please, is the one that defines the new origin of the planet Hall after the expansion.

Of the three hypotheses presented by experts, the second one seems the most plausible, especially since binary systems are not at all rare. But for now, everything remains at a hypothetical level.

Another myth about male hunters is dispelled

So we all learned in school that in primitive societies, whether prehistoric or more recent, men were the ones who hunted, who provided food for the group, risking their lives, nerves and health, while women took care of the children, the huts , perhaps also engaged in more peaceful activities such as gathering.

It seems we’ve been learning wrong, says a team of researchers from the University of Washington, Seattle, in a study recently published in the journal PLOS One. Women were as brave as men, and hunting was an activity in which most participated. In fact, the study says, in 80% of the societies they observed, the researchers found that women were good hunters, and in a third of them they even hunted large animals (over 30 kg).

The idea is not new. In fact, it was issued back in 1966. But in the meantime, evidence has accumulated in his favor, so we can talk about reliability. This study looked at, on the one hand, the societies and communities of the past. And here, for example, only in North America, of the 27 prehistoric individuals who were buried next to their hunting weapons, half were women.

Of the 63 communities in the tribal stage of development, communities that have existed for the past 150 years, 50 of them have documentary records indicating that women hunted. They did it to men, to other women, even to children. The bow was one of the most common types of weapons found in archaeological sites, but knives, spears, machetes, maces, etc. were also found.

In conclusion, the whole image of women simply taking care of the primitive household while men fight mammoths, cave bears, dagger cats or other vicious and aggressive animals is a fallacy created by early 20th century researchers of sexism. .

Who rejuvenates a person? Green plantations

Green areas, even parks, in large urban settlements play a more important role than you think in the well-being of people’s health. This is stated in a study in the journal Science Advances, published by a group of American researchers from the University of Chicago, Illinois.

You already knew that parks are good and useful for people. This is not the first study to highlight this aspect. It has not yet been said that green spaces have the ability to slow down aging. More precisely, from a biological point of view, people who spend more time in parks, in nature, are 2.5 years younger than their real age.

It was previously said that staying in such rooms reduces the risk of cardiovascular diseases, cancer, neurodegenerative diseases, etc., and implicitly reduces the mortality rate. The recent conclusion was made after a study that lasted at least 20 years and in which more than 900 people from several American cities were observed.

The idea was that those people who live in places where green space is about 30% of an area of ​​5 square kilometers are 2.5 years younger, biologically, compared to those who live in areas where green surfaces do not exceed 20%

Ah, the researchers know the result. That is, green spaces help to be healthier and younger. Why am I doing this? That remains to be determined, but we have a hunch we’ll find out soon, especially since the study authors said it’s the next step in their research.

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