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Кот научит как «ловить рыбу»

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All In One(AIO) ሁሉም አንድ ላይ

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All In One(AIO) ሁሉም አንድ ላይ

27 Nov, 20:42

Why food may taste weird in space?

📌 Despite being given carefully designed diet plans ⬆️, astronauts have reported that meals taste bland and that they were not meeting their nutritional needs, which can be dangerous for long-term missions. Astronauts typically only meet about 80% of their energy needs in space.

📌 Scientists already knew that low-gravity causes fluid to shift from the lower to the upper parts of the body, creating facial swelling and nasal congestion which affects smell and taste. But these symptoms begin to disappear within a few weeks.

📌 Researchers have found that spatial perception can play a significant role. A greater sense of loneliness and isolation — which astronauts may experience in space — can influence how people smell and taste their food.

📌 One of the long-term aims of the study is to make better tailored foods for astronauts, as well as other people who are in isolated environments, to increase their nutritional intake closer to 100%.

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All In One(AIO) ሁሉም አንድ ላይ

27 Nov, 20:41

How many hazards do humans encounter in space journeys?

🧑‍🚀🚀 Cosmonauts encounter five main hazards as they journey through space.

Space radiation
Invisible to the human eye, it is not only stealthy but considered one of the most hazardous aspects of spaceflight.

Isolation and confinement
Behavioral responses occur among groups of people far from Earth who are isolated and confined in a small space over a long period of time.

Distance from Earth
Instructions, new supplies, medical care, and more become increasingly challenging to receive from Earth as humans venture deeper into space.

Gravity (and the lack of it)
Astronauts' entire bodies – muscles, bones, inner ear, and organs – must adjust to the new gravities encountered in space and on other planets, and Earth once they return home.

Closed or hostile environments
Maintaining a safe ecosystem inside a spacecraft (optimal temperatures, pressures, lighting, microbial communities, etc.) presents unique challenges.

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All In One(AIO) ሁሉም አንድ ላይ

27 Nov, 20:41

What is gaslighting?

✔️Gaslighting is a form of psychological abuse whereby a person or group may intentionally or unintentionally manipulate one or more people into questioning their sanity and perception of reality to exert power or control over others with the goal of manipulating them.

✔️Those experiencing gaslighting may often feel confused about their version of reality, experience anxiety, or be unable to trust themselves. Gaslighting can have severe consequences on mental health.

✔️The term gaslighting originates from the 1938 play and subsequent 1944 movie titled ‘Gaslight’ in which a husband attempts to drive his wife crazy by dimming the lights (which were powered by gas) in their home, and then he later denies that the light changed when his wife points it out.

✔️Gaslighting is mostly known to be carried out by one person onto another person, commonly in romantic relationships, but can also occur in friendships, between family members, in the workplace, or politics.

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All In One(AIO) ሁሉም አንድ ላይ

27 Nov, 20:41

Who were the earliest carpenters?

📌 The pair of interlocking logs joined by an intentionally cut notch ⬆️ was unearthed beneath a bank of Zambia’s Kalambo River by archaeologists.

📌 Dating to nearly half a million years ago, this discovery radically changed scholars’ views of the capabilities of people of the past.

📌 Researchers believe the logs may have formed part of a walkway or the foundation of a platform built over wetlands.

📌 The 476,000-year-old log structure was likely the handiwork of the archaic human species Homo heidelbergensis.

📌 Scientists haven’t seen archaic humans manipulating their environment on such a large scale before.

📌 At the same site, the team also unearthed stone axes and 4️⃣ wooden tools – a digging stick, a wedge-shaped object, a notched branch, and a flattened log ⬆️ – dating to 390,000-324,000 years ago.

ℹ️ Prior to this discovery, the oldest known surviving wooden structures were built by people living around 11,000 years ago.

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All In One(AIO) ሁሉም አንድ ላይ

27 Nov, 20:41

What are whistlers and how far can they reach?

🔘 A whistler is a very low frequency (VLF) radio wave generated by different types of lightning, including volcanic lightning.

🔘 These special electromagnetic waves are so named because they can be converted to sound signals and, with a VLF receiver, anyone can listen to the everyday melody of millions of lightning bolts (even if not every lightning bolt becomes a whistler). A listener in New Zealand can even hear a volcano in Alaska erupt.

🔘 Frequencies of terrestrial whistlers are 1 kHz to 30 kHz, with maximum frequencies usually at 3 kHz to 5 kHz.

🔘 For decades, researchers thought lightning-induced whistlers would remain trapped relatively close to Earth’s surface, below about 1,000 km.

⚡️ Now scientists have discovered that whistlers can reach distances up to 20,000 km above the planet’s surface, travelling deep into the highest layers of the atmosphere, where it could threaten the safety of satellites and astronauts.

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All In One(AIO) ሁሉም አንድ ላይ

27 Nov, 20:41

What is the closest exoplanet that might have an ocean of liquid water?

The exoplanet LHS 1140 b is one of the closest discovered planets that lies within its star’s habitable zone — the region where a planet could retain liquid water – and might have an atmosphere and an ocean of liquid water.

⬆️ According to an international scientists’ team, LHS 1140 b might be what’s called an eyeball planet, with a single liquid ocean surrounded by ice. Or it might be entirely ice-covered, with an ocean below the ice, similar to Jupiter’s moon Europa or Saturn’s moon Enceladus.

Located only 48-49 light-years away in the constellation Cetus, LHS 1140 b is 1.7 times the size of our planet Earth and is the most promising habitable zone exoplanet yet in search for liquid water beyond the Solar System.

The team hopes to determine the planet’s surface characteristics and delve deeper into its atmosphere. It will likely take years to obtain all the needed data.

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All In One(AIO) ሁሉም አንድ ላይ

27 Nov, 20:41

How many mass extinctions have there been and which one was the most devastating?

In the last 500 million years, five great mass extinction events have changed the face of life on Earth. We know what caused some of them, but others remain a mystery.

1️⃣ The Ordovician-Silurian mass extinction occurred 443 million years ago and wiped out approximately 85% of all species. Scientists think it was caused by temperatures plummeting and huge glaciers forming, which caused sea levels to drop dramatically. This was followed by a period of rapid warming. Many small marine species died out.

2️⃣ The Devonian mass extinction event took place 374 million years ago and killed about three-quarters of the world's species, most of which were marine invertebrates that lived at the bottom of the sea. This was a period of many environmental changes, including global warming and cooling, a rise and fall of sea levels and a reduction in oxygen and carbon dioxide in the atmosphere. We don't know exactly what triggered the extinction event.

3️⃣ The Permian mass extinction, which happened 250 million years ago, was the largest and most devastating event of the five. The Permian-Triassic extinction event is also known as the Great Dying. It eradicated more than 95% of all species, including most of the vertebrates which had begun to evolve by this time. Some scientists think Earth was hit by a large asteroid which filled the air with dust particles that blocked out the Sun and caused acid rain. Others think there was a large volcanic explosion which increased carbon dioxide and made the oceans toxic.

4️⃣ The Triassic mass extinction event occurred 200 million years ago, eliminating about 80% of Earth's species, including many types of dinosaurs. This was probably caused by colossal geological activity that increased carbon dioxide levels and global temperatures, as well as ocean acidification.

5️⃣ The Cretaceous mass extinction event occurred 66 million years ago, killing 78% of all species, including the remaining non-avian dinosaurs. This was most likely caused by an asteroid hitting the Earth in what is now Mexico, potentially compounded by ongoing flood volcanism in what is now India.

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How did the dinosaur with the strongest bite look like? 🦖 T.rex (Tyrannosaurus rex) that stomped the Earth from about 68 million to 66 million years ago is a repeat science fiction star for a reason: its bite was ferocious and could deliver up to six tons of pressure or about 50,000-60,000 newtons....

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All In One(AIO) ሁሉም አንድ ላይ

27 Nov, 20:41

What is the difference between a “normal” and a mass extinction?

✔️ Extinction is a part of life, and animals and plants disappear all the time.

✔️ When a species disappears, scientists say that a species goes extinct.

✔️ From an evolutionary perspective, the role of species that become extinct in the ecosystem is usually filled by new species, or other existing ones.

❗️ Earth's 'normal' extinction rate is often thought to be somewhere between 0.1 and 1 species per 10,000 species per 100 years. This is known as the background rate of extinction.

✔️ However, during the history of life on Earth, there have been periods of mass extinction.

❗️ A mass extinction event is when species vanish much faster than they are replaced. This is usually defined as about 75% of the world's species being lost in a short period of geological time - less than 2.8 million years.

ℹ️ About 98% of all the organisms that have ever existed on our planet are now extinct.

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All In One(AIO) ሁሉም አንድ ላይ

27 Nov, 20:41

How can plants cope with stresses and even “speak” to fungi?

Abiotic stresses, such as nutrient deficiency, drought, high temperature, and light stress, are significant limiting factors of plant survival and growth.

Scientists already knew that plant hormones (phytohormones), organic molecules that cause signaling effects in plant tissues, play an essential role in enhancing plant tolerance by responding to abiotic stresses.

But several recent studies have shown that strigolactones (SLs), carotenoid derivatives that occur naturally in plants, are novel phytohormones that regulate plant metabolism and growth, and help to cope with various stresses, e.g. by initiating physiological responses against drought stress.

SLs are also crucial for the interaction of plants with soil microorganisms like fungi, providing inter-kingdom communication.

In addition to attracting microorganisms, SLs affect photosynthesis, bridge other phytohormones, induce metabolic compounds.

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All In One(AIO) ሁሉም አንድ ላይ

27 Nov, 20:41

What organisms are holobionts?

According to modern scientists, organisms are holobionts, and life is sympoietic.

The term “holobiont” refers to the scientific conclusion that organisms are integrated consortia of a host organism plus numerous species of other symbiotic organisms.

With few (if any) exceptions, animals and plants are holobionts, federated partnerships of numerous species functioning together to generate a healthy organism.

For example:
🧍‍♂️🧍‍♀️In the adult human body, microbes account for approximately half of cells, and these bacteria, fungi, protists, and archaea are critical for healthy physiology, development, and immunity.
🐄 Cows are herbivores, but there are no genes in their bovine nuclei that encode grass-digesting enzymes, and these cellulose-digesting enzymes come from the set of microbes living within the rumen of the cattle’s guts.
🪸 In coral, most of the animal’s carbon resources are derived from the photosynthetic reactions of its algal symbionts.

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All In One(AIO) ሁሉም አንድ ላይ

27 Nov, 20:41

Why are moiré patterns important for materials science?

The so-called moiré patterns are motifs that emerge when two repetitive structures are overlaid.

This phenomenon is well known from computer or TV screens: when looking at a finely striped pattern, e.g. on a shirt, the stripes do not look evenly spaced and seem to bend in some areas. While undesirable in this case, the moiré effect can indeed be surprisingly useful.

Two atomically thin materials can be overlapped to create a new material, in which the atomic structures of the two produce a moiré pattern.

Some of these moiré materials exhibit astonishing properties, drastically different from those of their components, which may be applied in science, e.g. in novel nano-electronic devices.

The term originates from a French word “moiré”, a type of textile, traditionally made of silk but now also made of cotton or synthetic fiber, with a rippled or "watered" appearance, by pressing two layers of the textile when wet.

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All In One(AIO) ሁሉም አንድ ላይ

27 Nov, 20:41

How to collect energy from raindrops?

💦 Raindrops falling from the sky can produce a small amount of energy that can be harvested and turned into electricity.

Researchers have recently proposed several different devices for harvesting such dispersed hydropower.

One of the last inventions is a superhydrophobic magnetoelectric generator (MSMEG) ⬆️.
It consists of 5️⃣ parts:
📍a superhydrophobic magnetic material-based film (SMMF)
📍a coil
📍a NdFeB magnet
📍an acrylic housing
📍an expandable polystyrene (EPS) base.
According to scientists, the MSMEG can quickly charge a commercial capacitor with 2.7 V/1 F to 1.18 V within 200 seconds and power diverse electronic devices, e.g. LEDs and fans.
The authors of this study believe that such an MSMEG may provide a promising strategy for efficiently harvesting dispersed raindrop energy.

However, there are also opinions that such technologies are difficult to develop on a large scale and have limited practical application.

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All In One(AIO) ሁሉም አንድ ላይ

27 Nov, 20:41

How many people live in cities today?

🏙 Today, about 4.6 billion or 57% of the more than 8 billion people worldwide live in urban areas, according to different sources.

🌇 By 2050 this proportion is expected to increase to 68%, adding another 2.5 billion people to urban areas.

🏙 Today, the most urbanized regions include Northern America (with 82% of its population living in urban areas in 2018), Latin America and the Caribbean (81%), Europe (74%) and Oceania (68%).

🌇 A UN report notes that future increases in the size of the world’s urban population are expected to be highly concentrated in just a few countries. Together, India, China and Nigeria will account for 35% of the projected growth of the world’s urban population between 2018 and 2050, adding respectively 416, 255 and 189 million urban dwellers.

🏙 At present there are 3️⃣4️⃣ cities worldwide with more than 10 million inhabitants.

🎉⬆️ World Cities Day, designated by the UN, is celebrated annually on 31 October.

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All In One(AIO) ሁሉም አንድ ላይ

27 Nov, 20:41

What is the minimum of light required for plants to grow?

🌿☀️ Plants can grow with much less light than previously thought, according to a new study.

✅ Researchers lowered light sensors into Arctic water to a depth of 50 metres (164 feet) to test how low light levels must become before plant life ceases to exist and found that tiny water-based organisms called microalgae were able to perform photosynthesis with very little light ⬆️.

✅ The microalgae carry out this process at the lowest light levels ever recorded – just 0.04 micromoles of photons.

✅ This isn’t very far from what computer simulations predict to be the lowest light possible in any circumstances – 0.01 micromoles of photons.

✅ Typical light conditions outside on a clear day are between 1,500-2,000 micromoles of photons – more than 37,000-50,000 times the amount of light required by those microalgae.

ℹ️ This research can potentially make it easier to grow plants in areas with little sunlight and even in space.

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All In One(AIO) ሁሉም አንድ ላይ

27 Nov, 20:41

Do migratory birds save energy escaping winter?

✔️ Scientists have long surmised that birds migrate during winters to save energy: far away from the biting cold, birds would need to expend less energy to keep themselves warm.

✔️ A new study has shown that migratory lifestyle carries no added overall energy cost.

✔️ Scientists have found partially migratory Eurasian blackbirds (Turdus merula) ⬆️ migrating to warmer regions in winter didn’t save more energy compared to members of the same species that stayed behind.

✔️ To measure the birds’ heart rate and body temperature over the course of the winter, researchers used surgically implanted biologgers.

✔️ It was also found that migrating birds started saving energy for migration by lowering their heart rate and body temperature almost a month before their departure.

✔️ The research raises important questions on why birds migrate if there’s no energy benefit, and where the unaccounted energy is being used instead.

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All In One(AIO) ሁሉም አንድ ላይ

27 Nov, 20:41

What are some examples of the smallest 3D-printed items?

🛳 The smallest boat ever sailed is a 11.5-micrometer-long – 0.0004-inch, about one-third of the thickness of a human hair – and is 3D-printed ⬆️. This tiny ship, named for a popular 3D-printing test "3DBenchy", was made by a team at Leiden University, the Netherlands in 2020. The scientists created the boat in a bid to enrich their research on microswimmers, or small particles that move in liquid.

🪧 The smallest 3D-printed billboard is 1.424 square millimetres (0.002 square inches), and was made by Kao Commercial, in Shanghai, China, in December 2021 ⬆️.

🗺 Scientists have created an accurate 3D map of the Earth that is so small that one-thousand of them could fit on one grain of salt. Patterns of the Earth’s continents were created using an incredibly sharp silicon knife to carve features as small as 15 nanometres on a polymer substrate measuring only 22 by 11 micrometres ⬆️.

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All In One(AIO) ሁሉም አንድ ላይ

27 Nov, 20:41

What are some examples of the largest 3D-printed objects?

🛳 The largest 3D printed boat is 11.980 m and was achieved by Abu Dhabi Maritime and Al Seer Marine (both UAE), in Abu Dhabi, UAE, on 6 Nov 2023 ⬆️.

⬛️ The largest 3D-printed structure (volume) is a wall with an outer shell and an inner filling that consists of 11.07 m³ of 3D-printed material and was achieved by Dubai Municipality (UAE), in Dubai, on 16 Oct 2019.

⚙️ The largest functional object to be 3D-printed in metal is a key jet engine component called a turbofan, measuring 1.5 m in diameter, printed in sections by Rolls-Royce and tested in July 2014.

🏠 The largest 3D printed villa is 303.42868 sq m (3266.079 sq ft) and was achieved by 3DXB Group, Dubai Municipality and Mohammed Bin Rashid Housing Establishment (all UAE) in Dubai, UAE, on 7 Dec 2023.

🏳️ The largest 3D-printed flag measures 16.2688 m² (175 ft² 11 in²), and was achieved by Anmar Gabra (KSA) in Makkah, Kingdom of Saudi Arabia, on 18 Aug 2024.

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All In One(AIO) ሁሉም አንድ ላይ

27 Nov, 20:41

When was 3D printing invented?

📌The 1980s were a dynamic period in the history of 3D printing.

📌In 1981, a Japanese inventor Dr. Hideo Kodama paved the way for 3D printing technologies. He laid the foundation for additive manufacturing and developed a system for creating three-dimensional objects through a layer-by-layer approach using photosensitive resins.

📌In 1984, a US inventor Charles (Chuck) Hull patented filed the first patent for 3D printing – the Stereolithography process, the first commercial 3D printing technology and introduced the concept of layer-by-layer fabrication, which is fundamental to modern 3D printers.

📌Before emerging in a laboratory, 3D printing was described in science fiction:
✍️in 1945, in his “Things Pass By” Murray Leinster envisaged a constructor that used “magnetronic plastics” for fabricating articles from scanned drawings
✍️in 1950, Raymond F. Jones introduced the idea of a “molecular spray” to create items in his “Tools of the Trade”.

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All In One(AIO) ሁሉም አንድ ላይ

27 Nov, 20:41

What are the largest galaxy-made structures in the Universe?

ℹ️ Astrophysical jets are collimated streams of magnetized plasma produced by compact accreting objects, e.g. neutron stars or black holes.

When sustained for megayears (such long-lived coherence being yet unknown), these jets from supermassive black (SMBHs) holes become the largest galaxy-made structures in the Universe.

Named Porphyrion, after the king of giants in Greek mythology, the jets:
🌌stretch for around 23 million light-years – as long as 140 Milky Way galaxies
🌠are born at the heart of a galaxy located around 7.5 billion light-years away and are seen as they were when the 13.8 billion-year-old universe was just 6.3 billion years old
🔥put out trillions of times more energy per second than our sun does.

🌐 In terrestrial dimensions, this SMBH would have the size of 0.2 millimeters and the jets – the size of the Earth: an amoeba that generates a powerful fountain of energy the size of the entire planet!

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All In One(AIO) ሁሉም አንድ ላይ

27 Nov, 20:41

Is there a battery that can last for decades?

☢️🔋 A nuclear battery powered by radioactive decay can last for decades.

Researchers have wanted to use radioactive atoms to build exceptionally long-lasting and damage-resistant batteries since the 1900s. But all prototypes were not very efficient.

Chinese scientists have improved the efficiency of a nuclear battery design by a factor of 8000.

The researchers used americium that is usually considered to be nuclear waste and radiates energy in the form of alpha particles, which carry lots of energy but quickly lose it to their surroundings. They embedded americium into a polymer crystal that converted this energy into a sustained and stable green glow.

Although americium has a half-life of 7380 years, this micronuclear battery ⬆️ should run for several decades, because the components surrounding the sample will eventually be destroyed by the radiation.

The battery may be used for deep-sea exploration and space missions.

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Why food may taste weird in space? 📌 Despite being given carefully designed diet plans ⬆️, astro...

How many hazards do humans encounter in space journeys? 🧑‍🚀🚀 Cosmonauts encounter five main haza...

What is gaslighting? ✔️Gaslighting is a form of psychological abuse whereby a person or group ma...

What clouds are rare and form in unique ways? Lenticular, or lee wave, clouds ▫️are lens-shaped...

Who were the earliest carpenters? 📌 The pair of interlocking logs joined by an intentionally cut...