Month February 2023

(Pronounced suhb.vuht)

Meaning: A verb, subvert refers to trying to destroy or ruin something such as an established government or political system in a sneaky way or overturning something from the foundation or base. In other words, “to subvert something” means “to destroy its power or influence.”

Origin: The term originates from the Latin root subvertere, meaning “to turn upside down or overthrow”; a combination of sub-“from below or under” and vertere “to turn”. It’s been in use in English since the late 14th Century.

Usage: Extradition acts as a deterrent against potential offenders who consider escape an easy way to subvert justice.

The rebel army is trying to subvert the government.

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(pronounced as ri,vai,tal,aiz)

Meaning: The word revitalize corresponds to imbuing something with new life and vitality.

Origin: The word, which has been around since the 1840s, is arrived at by combining re with vitalize. While the re denotes “back, again”, the vitalize is used to imply “giving life to”. The word vitalize has been around since the 1670s and is arrived at by giving vital the suffix ize.

The word grew steadily in popularity in the second half of the 20th Century and reached a peak around the turn of the century. While its usage has come down since then, it still enjoys considerable popularity.

Usage: Her introduction as a substitute revitalised the entire team to perform better.

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(pronounced aw-day-shuhs)

 Meaning: As an adjective it refers to someone who is very bold or daring.

Origin: It first appeared in English language in the mid-1500s. It was borrowed from the French adjective audacieux, which was derived from the noun audace (boldness). Audace can be traced to the Latin verb audere (“to dare”)

Usage: Audacious adventurers risked everything they had for a shot at glory.

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 A five-year-old girl in Karnataka recently tested positive for Zika virus.

Mosquitoes are notorious for their itchy bites, but what makes them a cause for concern is their ability to carry and spread deadly diseases to humans. Diseases spread by mosquitoes include Zika fever, chikungunya, Japanese encephalitis, dengue, and malaria. Recently, a five-year-old girl in Karnataka tested positive for zika virus, a mosquito-borne disease.

 The Zika virus is transmitted by the Aedes species of mosquito. It is transmitted by Aedes aegypti, which bites during the day and is generally found throughout the world.

Though the infection is not serious for most people, it can be dangerous for pregnant women. The infection during pregnancy can cause infants to be born with microcephaly, a condition where a baby’s head is much smaller than expected restricting brain growth. Aedes mosquitoes can be distinguished by their narrow, black body, and alternating light and dark bands on the legs.

What we need to do is to be aware of the symptoms of Zika fever and keep ourselves safe. The symptoms of Zika virus are fever, rash, conjunctivitis, muscle and joint ache, and headache that last about a week.

Avoiding mosquito bites in places where the Zika virus has been reported is a way of preventing the disease. Stay fully covered in the mornings and sleep under a mosquito net during the night if your area is mosquito-prone. Aedes aegypti mosquitoes breed in clean water. So removing stagnant water helps. Keep your clean to prevent mosquitoes from breeding.

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Mars rover’s microphone captures ten seconds of rumbling noise created by dust devil on the Red Planet. It’s the same microphone that provided the first sounds of Martian wind in 2021.

What does a dust devil sound like on Mars? A NASA rover by chance had its microphone on when a whirling tower of red dust passed directly overhead, recording the racket.

It’s about 10 seconds of not only rumbling gusts of up to 40 kph, but the pinging of hundreds of dust particles against the rover Perseverance. Scientists released the first-of-its-kind audio. It sounds strikingly similar to dust devils on Earth, although quieter since Mars’ thin atmosphere makes for more muted sounds and less forceful wind, according to the researchers.

The dust devil came and went over Perseverance quickly last year, thus the short length of the audio, said the University of Toulouse’s Naomi Murdoch, lead author of the study appearing in Nature Communications.

At the same time, the navigation camera on the parked rover captured images, while its weather-monitoring instrument collected data.

“It was fully caught red-handed by Persy,” said co-author German Martinez of the Lunar and Planetary Institute in Houston.

Photographed for decades at Mars but never heard until now, dust devils are common at the red planet.

This one was in the average range: at least 400 feet (118 metres) tall and 80 feet (25 metres) across, travelling at 16 feet (5 metres) per second.

The microphone picked up 308 dust pings as the dust devil whipped by, said Murdoch, who helped build it.

Given that the rover’s SuperCam microphone is turned on for less than three minutes every few days, Murdoch said it was “definitely luck” that the dust devil appeared when it did on Sept. 27, 2021. She estimates there was just a 1-in-200 chance of capturing dust-devil audio. Of the 84 minutes collected in its first year, there’s “only one dust devil recording,” she wrote in an email from France.

WHAT IS A DUST DEVIL?

• Common across Mars, dust devils are short-lived whirlwinds loaded with dust that form when there is a major difference between ground and air temperatures.
• They are a common feature in the Jezero crater, where the Perseverance rover has been operational since February 2021 – but it had never before managed to record audio of one of them.
• By chance on September 27, 2021, a dust devil 118 metres high and 25 metres wide passed directly over the rover.
• This time, the microphone on the rover’s SuperCam managed to catch the muffled, whirring sounds.

Sounds…so far

• The same microphone on Perseverance’s mast provided the first sounds from Mars namely the Martian wind soon after the rover landed in February 2021.
• It followed up with audio of the rover driving around and its companion helicopter, little Ingenuity, flying nearby, as well as the crackle of the rover’s rock-zapping lasers, the main reason for the microphone.

ROCK SAMPLES

On the prowl for rocks that might contain signs of ancient microbial life, Perseverance has collected 18 samples so far at Jezero Crater, once the scene of a river delta. NASA plans to return these samples to Earth a decade from now. Its helicopter Ingenuity has logged 36 flights, the longest lasting almost three minutes.

CAN ACOUSTIC DATA SOLVE THE MARTIAN MYSTERY?

• These recordings allow scientists to study the Martian wind, atmospheric turbulence and now dust movement as never before.
• The impact of the dust-made “tac tac tac sounds will let researchers count the number of particles to study the whirlwind’s structure and behaviour.
• It could also help solve a mystery that has puzzled scientists. On some parts of Mars, whirlwinds pass by sucking up dust, cleaning the solar panels of rovers along the way.
• Understanding why this happens could help scientists build a model to predict where the whirlwinds might strike next.
• It could even shed light on the great dust storms that sweep across the planet, famously depicted in the 2015 science-fiction film “The Martian”.

Picture Credit : Google 

Researchers have surpassed an important milestone for nuclear fusion technology: getting more energy out than was put in. Some consider this to be the energy of the future since nuclear fusion produces no greenhouse gases and leaves little waste. So, how does it work, what projects are underway, and when could they be completed? Come, let’s find out

What is fusion?

Fusion is the process that powers the sun. Two light hydrogen atoms, when they collide at very high speeds, fuse together into one heavier element, helium, releasing energy in the process. (Fusion differs from fission, the technique currently used in nuclear power plants, by fusing two atomic nuclei instead of splitting one.) “Controlling the power source of the stars is the greatest technological challenge humanity has ever undertaken,” tweeted physicist Arthur Turrell, author of “The Star Builders”.

Creating fusion on Earth

Producing fusion reactions on Earth is possible only by heating matter to extremely high temperatures – over 100 million degrees Celsius. “So we have to find ways to isolate this extremely hot matter from anything that could cool it down. This is the problem of containment.” Erik Lefebvre, project leader at the French Atomic Energy Commission (CEA), said.

One method is to “confine” the fusion reaction with magnets. In a huge doughnut shaped reactor, light hydrogen isotopes (deuterium and tritium) are heated until they reach the state of plasma, a very Low density gas. Magnets confine the swirling plasma gas, preventing it from coming into contact with the chambers walls, while the atoms collide and begin fusing. This is the type of reactor used in the major international project known as ITER currently under construction in France, as well as the Joint European Torus (JET) near Oxford, England.

A second method is inertial confinement fusion, in which high energy lasers are directed simultaneously into a thimble-sized cylinder containing the hydrogen (as shown in the graphic). This is the technique used by scientists at the National Ignition Facility (NIF) at Lawrence Livermore National Laboratory (LLNL) in California, the U.S. who were behind the recent announcement. Inertial confinement is used to demonstrate the physical principles of fusion, while magnetic confinement seeks to mimic future industrial-scale reactors.

What is net energy gain?

For decades, scientists had attempted to achieve what is known as “net energy gain” – in which more energy is produced by the fusion reaction than it takes to activate it.

LLNL director Kim Budil cautioned that much remains to be done before this energy can be commercially viable. “There are very significant hurdles, not just in the science but in technology,” Budil said. “A few decades of research on the underlying technologies could put us in a position to build a power plant.” To get there, researchers must first increase the efficiency of the lasers and reproduce the experiment more frequently.

Fusion has several benefits, but…

The NIF’s success has sparked great excitement in the scientific community, which is hoping the technology could be a game-changer for global energy production.

Unlike fission, fusion carries no risk of nuclear accidents.

“If a few lasers are missing and they don’t go off at the right time, or if the confinement of the plasma by the magnetic field… is not perfect,” the reaction will simply stop, Lefebvre says.

Nuclear fusion also produces much less radioactive waste than current power plants, and above all, emits no greenhouse gases. “It is an energy source that is totally carbon-free, generates very little waste, and is intrinsically extremely safe,” according to Lefebvre, who says fusion could be “a future solution for the world’s energy problems”.

However, the technology is still a far way off from producing energy on an industrial scale, and cannot therefore be relied on as an immediate solution to the climate crisis.

Picture Credit : Google 

While the arrival of cheetahs from South Africa certainly dominated headlines in 2022, several other species too were in the spotlight in our country for various reasons. Let’s take a look at a few of them

Tiger

As a keystone species, the tiger continues to get national attention, and rightly so. Our country is home to over 50 tiger reserves, and this year, two more got added to that list. The 52nd tiger reserve is in Rajasthan-Ramgarh Vishdhari, spread across Bundi, Bhilwara, and Kota districts over an area of more than 1,500 sq.km. The State’s fourth tiger reserve – after Ranthambore, Sariska, and Mukundra, it is expected to be a major corridor connecting tigers of Ranthambore and Mukundra reserves. The country’s 53rd tiger reserve is in Uttar Pradesh-the Ranipur Tiger Reserve in Chitrakoot district, spread over nearly 530 sq.km. This is the State’s fourth tiger reserve after Dudhwa, Pilibhit, and Amangarh. The new reserve in the Bundelkhand region is just 150 km from the Panna Tiger Reserve in Madhya Pradesh.

Elephant

While Project Tiger is perhaps the most popular in the country, there are other projects looking at protecting specific species. One of them is Project Elephant. Set up in 1992, the initiative has been pivotal in the creation of several elephant reserves across the country. In October, the newest addition to the list – Terai Elephant Reserve at Dudhwa-Pilibhit in Uttar Pradesh – was approved by the Union government. When it becomes a reality, it will be the country’s 33rd elephant reserve, and according the government, “will help in conserving trans-boundary migratory elephant population”.

Dugong

The year 2022 is seen as a watershed moment in the conservation of a vulnerable marine species-the dugong. Tamil Nadu notified India’s first ever dugong conservation reserve in the Palk Bay area of the Gulf of Mannar, which lies between Sri Lanka and the southern tip of India. The move, though seen as long overdue, is vital for the animal as much as it is for the local communities. Keeping with dismal global records, India’s dugong population too has been declining. It is believed that there could be just around 200 dugongs left in our waters. These marine mammals, also called sea cows, can be spotted in our country near the Andaman and Nicobar Islands and off the coast of Tamil Nadu in the Gulf of Mannar and Palk Bay. It’s in the Palk Bay, on approximately a 450-sq km. area, that the reserve will come up.

Turtles

It’s not just large creatures that were in the news in 2022. Even smaller ones such as tortoises and turtles got global attention. To be precise, at the 19th Meeting of the Conference of the Parties (CoP 19) to the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) held at Panama City in November. According to the Union government. “At CoP 19, India’s proposal for induction of fresh water turtle Batagur kachuga eamed wide support of the parties in CoP 19 of CITES It is said that CITES also recorded the works done “in the area of conservation of tortoises and fresh water turtles and efforts made in combating wildlife crime and illegal trade of turtles in the country” At the event, India “reiterated its commitment regarding conserving tortoises and fresh water turtles in the country”

Great Indian bustard

The one bird species that’s often in the news in our country is the great Indian bustard. It was no different in 2022. Though the news about the bird is often worrisome, this time around it appeared to offer some hope for the species, and consequentially, conservationists. One of the reasons for the bird’s fatality is through overhead power lines hit. The Supreme Court had initiated many steps to protect the species, including setting up a three-member committee to assess the feasibility of laying high-voltage underground power cables in Rajathan and Gujarat, States where the birds are sighted today. In such a scenario, late in 2022, the country’s top court asked the union government why it should not consider the idea of establishing Project Great Indian Bustard on the lines of the country’s successful Project Tiger.

Picture Credit : google 

Also called the “third zone” of the solar system, this large volume of space outside Neptune’s orbit is home to thousands of icy, cold objects. This is where Pluto is also present.

In the cold, outermost area of our solar system lies one of the largest structures in our solar system. Also called the “third zone” of the solar system, this “donut-shaped” volume of space is called the Kuiper belt. This is where Pluto is also present.

The region encompasses hundreds of thousands of icy, cold objects and is outside Neptune’s orbit.

The region is named so after astronomer Gerard Kuiper, who published a paper speculating objects beyond Pluto. This was also suggested by Astronomer Kenneth Edgeworth in the papers he published and sometimes this belt is called the Edgeworth-Kuiper Belt. Some researchers also refers to it as the Trans-Neptunian Region.

The icy bodies are called Kuiper Belt Objects (KBOS) or trans-Neptunian objects (TNOS). They are highly diverse in terms of size, shape, and colour. A significant number of KBOS have moons.

So how did the icy objects form? According to scientists, these icy objects are leftovers after the formation of our solar system. The region must have formed after these objects came together to form a planet but Neptune’s gravity played spoilsport. The gravity shook up this region and these icy objects couldn’t join to form a planet.

The Kuiper Belt volume is being lost nowadays. The amount of material which it carries now is much less when compared to what it contained earlier.

The objects in the belt collide and lead to fragmented, smaller objects. Sometimes the dust gets blown out of the solar system. We take a look at a few of the KBOS.

Haumea

This KBO is known for its strange shape and rotation style. According to NASA, the Haumea resembles a squashed American football. This was a result of the object’s collision with another object half the size of it.

Eris

Smaller than Pluto, Eris takes 557 years to orbit the Sun. It has a moon called Dysnomia.

Arrokoth

Lying some billion miles past Pluto is the Arrokoth, a Kuiper Belt Object which means sky in the Native American language. This small snowman-shaped object is believed to hold clues about the origin of life on Earth and also about the planet’s formation.

Picture credit : Google 

Agatha Christie is famed as the best-selling author of all time, However, she was not the most prolific writer of her family. Agatha grew up with two older siblings, out of them, her older sister Margaret (nicknamed Madge) also pursued writing and was considered to be the more promising writer.

By 1916, Madge had already written and published a few short stories, while Agatha had not published any. So when the latter shared the idea of writing a mystery novel with Madge, her sister was not as enthusiastic. She bet that Agatha would not be able to craft a compelling mystery and it certainly would not be something she could not solve. Taking up the challenge, the 26-year-old Agatha got to work and wrote, what would become her debut mystery novel, The Mysterious Affair at Styles. Today, this novel stands alongside hundreds of mysteries Agatha crafted during her illustrious writing career.

Crafting a perfect mystery

Agatha Christie’s stories are like a puzzle box full of clues, misdirection and drama. But what are the essential elements of crafting a perfect mystery?

Setting

One of the most important decisions while designing any story is choosing the setting. Whether it was a remote island or yacht or a snow-stalled train stall, the author would always favour eerie and isolated locations, a trend that most of her stories follow. By doing so she limited the movement of her characters and build tension by forcing these plausible suspects to stay put, with the killer lurking among them.

In some cases, she would heighten the drama by making the characters strangers, unsure of who they could trust.

Characters

As a keen observer of human behaviour, she would often use peculiar traits or habits of the people around her to create authentic characters. However, one of the most popular criticisms of her novels is her use of two-dimensional characters that would easily reflect the stereotypes of her time. Future writers are advised not to emulate this trait of hers.

Language

It is a mystery writer’s job to concoct stories that are complex and full of riddles and clues. Making it merely a balancing act between being clever and not confusing. The English author used simple, precise and accessible language to accomplish this task. The clarity of her language makes her stories palatable and engaging and can be credited with making her the ‘Queen of mystery’.

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Plants do not store information the way we humans do, but they have a way of remembering – they store memories “in sophisticated cellular and molecular signalling networks”. Called ‘somatic memory’, it is stored in the plant’s body. And, this is what a plant passes down to its offspring.

The act of learning is usually attributed to animals. A few studies in the past have shown that plants can learn too. However, a new analysis suggests that plants are capable of more than just learning. What is it? Come, let’s find out.

From floods and heat waves to drought and wildfires, extreme weather events caused due to climate crisis have been affecting natural wildlife habitats the world over. Such changes to their environment have forced animals to change their behaviour too – “altering their hunting and hibernation patterns and moving habitats”. But animals aren’t the only ones adapting to change. As the new research indicates, plants too are forced to “quickly adapt to survive. And, as part of this adaptation, they also “transmit these new traits on to their offspring” – in what is seen as teaching.

It may seem impossible that rooted as they are to the spot, plants are able to adapt, much less teach. But this is exactly what is happening. For instance, plants use the winter season to get ready for flowering in spring, which is the next season. With winters becoming shorter, some plants now have mechanisms in place that allow them “to avoid flowering in periods where they have less chances to reproduce”. Plants do not store information the way we humans do, but they have a way of remembering – they store memories “in sophisticated cellular and molecular signalling networks”. Called ‘somatic memory, it is stored in the plant’s body. And, this is what a plant passes down to its offspring. Researchers say this is not a genetic change, rather it is what they call ‘epigenetics”; “they can change how an organism reads a DNA sequence”. This contributes “to the long-term adaptation of plant species to climate change”.

Did you know?

Epigenetics is the study of how your behaviours and environment can cause changes that affect the way your genes work. Unlike genetic changes, epigenetic changes are reversible. They do not change your DNA sequence, but they can change how your body reads a DNA sequence.

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