High-tech news: first photo of a black hole

Every week in the high-tech worldSomething interesting is happening: some send rovers, others create artificial intelligence, and still others try to photograph a black hole. We tried to collect all the most interesting things for the last 7 days, and now we will tell!

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one. Scientists have created an alternative rocket fuel, safe for people! The technology proposed by them may well turn into the standard type of rocket fuel of the future.

Modern rocket fuels are very toxic: people immediately get irritated with their eyes, shortness of breath and nausea, temporary blindness and damage to the organs of the nervous system, liver and kidneys. A recently proposed alternative is based on metal-organic structures containing zinc, cobalt and cadmium.

Researchers managed to create six typesfuels that are tuned to different properties — for example, a certain ignition delay. This means that use is not far off in many space missions, but not for such lengthy ones as flights to Mars.

2 Electrical brain stimulation temporarilyrejuvenates the human brain for 50 years! Recently, a group of scientists from the University of Boston demonstrated a technique that is able to restore the working memory of 70-year-old people so that it begins to work like that of 20-year-old young people.

In particular, we are talking about theta rhythms thatover time, they lose their synchronicity, which leads to the deterioration of working memory. To prove the effectiveness of electrical stimulation, the researchers gathered a group of volunteers between the ages of 20 and 60. They were given the task to view the image, pause, look at the second and name how it differs from the first. It is not surprising that young people coped with this task much better than the elderly. However, stimulation for 25 minutes helped improve working memory by as much as 50 minutes. It is noteworthy that it has improved even in young people.

Finding out that stimulation can make workingmemory of older people is as effective as that of 20-year-olds, the researchers decided to continue studying brain stimulation. In the future, they intend to carefully examine its impact on the brain in Alzheimer's disease.

3 Researchers from the university in philadelphiafound that some groups of bacteria can prevent the formation of road holes. By adding them to existing solutions, you can stop the formation of destructive substances and provoke the formation of strong cement.

Interacting with anti-icing solutions, they are able to convert calcium chloride to calcium carbonate, which is a natural cement and gives the road extra strength.

During the study, a series of samples was createdconcrete resistant to solutions against ice. They were exposed to calcium chloride for 28 days and it turned out that concrete containing bacteria really does not collapse, but becomes stronger. Due to the formation of particles of natural cement, the concrete road has become better able to withstand the acoustic vibrations arising from passing cars.

Someone, tell our "road builders" about these bacteria!

four. Meanwhile, published the first in historyThe real picture of the shadow of a black hole! Combining the power of telescopes allowed scientists to achieve a resolution exceeding the sensitivity of the Hubble Space Telescope a thousand times and to obtain the first data on the nearest vicinity of the central black hole of the M87 galaxy located in the Virgo constellation. The object has a mass of 6.5 billion solar and is located about 53.5 million light years from us.

The researchers hope that data analysisEvent Horizons received last year will help you understand which of these two assumptions is closer to the truth, and also tells you whether the shape of this “donut” or “dumbbell” changes over time.

Are you ready to improve your memory with electricity stimulation? Not afraid? You can write your opinion in the comments, or discuss in detail the topics in our Telegram-chat.