I miss!Meeting with the owner, the dog is happy to "tears and the eyebrows" | One week of technology

Welcome to technology for a week. This week you will see: ① Dogs also have "joyful tears"; ② new photos of Jupiter; ③ The genes like people are also similar; ④ lack of consciousness are selfish; ⑤ staring in dreams.

Tears

When reuniting with the owner, the dog will really be happy to "tears" -this is a recent study published in "Contemporary Biology" and found [1].

Pixabay

The researchers found 20 dogs to participate in the experiment. When the dog and the owner were separated for 5-7 hours, when they saw the owner again, the tears in the eyes would be more full (but not crying); and when I saw familiarity with But when the human beings are not human, there is no such change. Researchers believe that this change is caused by oxytocin -oxytocin is called "hormone of love", which is closely related to positive emotional connection. To verify this, they also used the eye drops with cooxine or placebo for dogs -they found that oxytocin did make the dog produce more tears.

Although it is difficult for us to know what animals think, the physiological phenomenon allows us to better understand the dog's reaction. At the same time, the appearance of "tears" will also make dogs more humane, making volunteers more want to touch and take care of them. Maybe, "tears" are also the "mind" of puppy evolution.

New photos of Jupiter

This week, NASA announced two new photos taken by James Wabo Space Telescope for Jupiter [2].

The following picture is formed by the images from three different infrared filters. Different wavelengths are represented by red, yellow-green, and cyan respectively. The color does not represent the color that the actual person's eye can be visible. In addition to large erythema, one of the most prominent features in the picture is the aurora generated by Jupiter's North and South poles, which shows orange in the figure.

NASA, ESA, CSA, Jupiter Ers Team; Image Processing by Judy Schmidt

Another picture is formed by two infrared filter images. In addition to Jupiter, the photo also shows a faint Jupiter halo, and Jupiter's two satellites -they are the "A Marcel" and Muwei Fifteen "Adehisia".

NASA, ESA, CSA, Jupiter Ers Team; Image Processing by Ricardo Hueso (upv/EHU) and Judy Schmidt

Inner similarity

There are some people who are unrelated but they look similar in this world: they obviously have no blood relationship, but they seem to have been twins who have been separated for many years. A recent study found that behind similar appearances, these people also shared similar genetic features [3].

The four pairs of similar appearances incorporated in the research

For many years, Canadian artist François Brunelle has been committed to looking for people who look exactly like around the world and take photos for them. The researchers contacted the 32 -looking subjects through the artist, quantified their similarity to their similarity with facial recognition algorithms, and collected saliva samples for genetic analysis. The results showed that the most similar -appearance subject genes also had the most in common. The most similar 9 of them shared 19277 single nucleotide polymorphism features, involving 3730 genes.

This study can help people understand how genes make people's appearance, and in the future may also make the technology from DNA reconstruction facial features more accurate.

Lack of consciousness is selfish

A new study found that even if it was only sleeping for an hour, lack of sleep can make people more selfish and help others more [4].

Sammy-sander/ pixabay

By tracking the individual of the subjects, the researchers found that the lack of sleep has significantly reduced their wishes to help others, whether the other party is a stranger or relatives and friends. Magnetic resonance imaging shows that the regional activity related to the pro -social behavior in the lack of sleep is reduced during the lack of sleep. The statistical data at the social level also shows the same law: at the beginning of the summer, the number of charity donations will decrease about 10%than usual. Researchers believe that this is precisely because the summer time starts to adjust the clock quickly, and people have lost an hour of sleep.

At the place where the summer time is implemented, the clock will be adjusted for an hour when the summer time will start -this means that people's sleep time will also be reduced by 1 hour | 24timezones.com

The results of the study suggest that lack of sleep will not only endanger personal physical and mental health, it may also harm the connection between people, and even have a negative impact on the entire society.

Stare in the dream

Why does the eyeball move in the fast -moving eye sleeping period of dreaming? A new study shows that the eyeball in sleep reflects where the animals are watching in their dreams [5].

What did the mouse see in the dream? | Jonathanric/ pixabay

To prove this, the researchers also observed the eyeballs of experimental mice during sleep, and neural signals related to the head orientation of the head in their brains. This head -oriented perception system will also be activated during fast -moving eye sleep, and it will always change the direction like when awake. It should reflect the head activity of animal dreams. The results showed that the eyeballs of the mice were very accurate with the direction of the heads they dreamed of -just like they were turning their heads and eyes. This means that eyeballs are likely to reflect the vision transfer in dreams, so as to provide a new window for studying the mysterious cognitive process of dreaming.

references

[1] https://www.cell.com/current-biology/FullText/s0960-9822 (2)01132-0

[2] https://blogs.nasa.gov/webb/2022/08/22/webbs-jupiter-showcase-auroras-hazes/

[3] https://www.cell.com/cell-ome/FullText/s2211-1247 (22) 01075-0

[4] https://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.3001733

[5] https://www.science.org/doi/10.1126/science.abp8852

Author: Mai Mai, the window knocks on the rain

Edit: Window knocking rain

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