Note4Students
From UPSC perspective, the following things are important :
Prelims level: Indian Gaur
Mains level: Not Much
The first population estimation exercise of the Indian gaur carried out in the Nilgiris Forest Division has revealed that more than an estimated 2,000 Indian gaurs inhabit the entire division.
Try this question from CSP 2012:
Q. Which one of the following groups of animals belongs to the category of endangered species?(2012)
(a) Great Indian Bustard, Musk Deer, Red Panda and Asiatic Wild Ass
(b) Kashmir Stag, Cheetal, Blue Bull and Great Indian Bustard
(c) Snow Leopard, Swamp Deer, Rhesus Monkey and Saras (Crane)
(d) Lion-tailed Macaque, Blue Bull, Hanuman Langur and Cheetal
Indian Gaur
- The Indian Gaur also called the Indian bison is one of the largest extant bovines found in India.
- It is native to South and Southeast Asia and has been listed as Vulnerable on the IUCN Red List since 1986.
- The global population has been estimated at maximum 21,000 mature individuals by 2016.
- It declined by more than 70% during the last three generations, and is extinct in Sri Lanka and probably also in Bangladesh.
- In Malaysia, it is called Seladang and Pyaung in Myanmar. The domesticated form of the gaur is called Gayal (Bos frontalis) or Mithun.
- They are highly threatened by poaching for trade to supply international markets, but also by opportunistic hunting, and specific hunting for home consumption.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Lonar Crater Lake, Pleistoscene epoch
Mains level: NA
The colour of water in Maharashtra’s Lonar Lake, formed after a meteorite hit the Earth some 50,000 years ago, has changed to glaring.
Make a note of all saltwater lakes in India. Few of them are Pulicat, Pangong Tso, Chilika, and Sambhar Lakes etc.
About Lonar Lake
- Lonar Lake, also known as Lonar crater, is a notified National Geo-heritage Monument, saline (pH of 10.5), Soda Lake, located at Lonar in Buldhana district, Maharashtra.
- It was created by an asteroid collision with earth impact during the Pleistocene Epoch.
- It is one of the four known, hyper-velocity, impact craters in basaltic rock anywhere on Earth.
- It sits inside the Deccan Plateau—a massive plain of volcanic basalt rock created by eruptions some 65 million years ago.
- Its location in this basalt field suggested to some geologists that it was a volcanic crater.
Why there’s a color change?
- The salinity and algae can be responsible for this change.
- There is no oxygen below one meter of the lake’s water surface.
- There is an example of a lake in Iran, where water becomes reddish due to increase in salinity.
- The level of water in the Lonar Lake is currently low as compared to the few past years and there is no rain to pour fresh water in it.
- The low level of water may lead to increased salinity and change in the behaviour of algae because of atmospheric changes.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Challenger Deep, Mariana Trench
Mains level: Deep sea exploration
On June 7, astronaut and oceanographer Kathy Sullivan, who was the first American woman to walk in space in 1984, became the first woman and the fifth person in history to descend to the deepest known spot in the world’s oceans, called the Challenger Deep in the Mariana Trench.
The ocean relief can be divided into various parts such as Continental Shelf, Continental Slope, Continental Rise or Foot, Deep Ocean basins, Abyssal plains & Abyssal Hills, Oceanic Trenches, Seamounts and Guyots.
Revise these ocean bottom relief features from your basic references.
Also revise India’s Deep Ocean Mission.
What is Challenger Deep?
- The Challenger Deep is the deepest known point in the Earth’s seabed hydrosphere (the oceans), with a depth of 10,902 to 10,929 m.
- The deepest part is called the Challenger Deep, which is located below the surface of the western Pacific Ocean.
- The first dive at Challenger Deep was made in 1960 by Lieutenant Don Walsh and Swiss scientist Jacques Piccard on a submersible called ‘Trieste’.
- The British Ship HMS Challenger discovered Challenger Deep between 1872-1876.
- In 2012, film director James Cameron reached the bottom of the Mariana trench after a descent that lasted 2 hours and 36 minutes.
- Cameron reached a depth of about 10,908 metres on a dive in his submersible called the ‘Deepsea Challenger’ and became the first to complete a solo submarine dive to this spot.
Why explore deep oceans?
- Ocean exploration, however, is not randomly wandering in hopes of finding something new.
- It is disciplined and organized and includes rigorous observations and documentation of biological, chemical, physical, geological, and archaeological aspects of the ocean.
- Most of the existing knowledge of the oceans comes from shallower waters, while deeper waters remain relatively unexplored, even as humans are relying more on these areas for food, energy and other resources.
- Further, finding out more about the deep ocean areas can potentially reveal new sources for medical drugs, food, energy resources and other products.
- Significantly, information from the deep oceans can also help to predict earthquakes and tsunamis, and help us understand how we are affecting and getting affected by the Earth’s environment.
What does it take to reach the deep ocean?
- Vehicles called Human Occupied Vehicles (HOVs) may be used that carry scientists to the deep sea.
- Alternatively, there are unmanned Remotely Operated Vehicles (ROVs) that are linked to ships using cables and can be steered by scientists remotely.
- Even so, it is difficult for most private citizens to travel more than 100 feet below the surface of the ocean.
- Further, technical divers can go as deep as 500 feet or more, but with an array of tanks filled with different gas blends.
Why is it so difficult to explore deep oceans?
- Most recreational divers can’t explore more than about 120 feet down due to the amount of air needed to keep lungs pressurized at depth.
- Such depths could lead to nitrogen narcosis, the intoxication by nitrogen that starts to set in around that depth (most of our atmosphere is nitrogen, not oxygen).
- Waters at such depths of several kilometres exert tremendous pressure which human bodies cannot sustain.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Poonam Awalokan
Mains level: Man-Animal conflict
Asiatic lions have now significantly risen in number at an estimated population of 674 in the Gir forest region of Gujarat. Unlike in previous years, this count was estimated not from a Census, but from a population “observation” exercise called Poonam Avlokan.
Try this question from CSP 2017:
Q. The term ‘M-STrIPES’ is sometimes seen in the news in the context of
(a) Captive breeding of Wild Fauna
(b) Maintenance of Tiger Reserves
(c) Indigenous Satellite Navigation System
(d) Security of National Highways
Asiatic Lion
- Indian Lion (Panthera Leo Persica) is listed as Endangered and exists as a single population in Gujarat.
- It is one of five big cat species found in India and Gir National Park and Wildlife Sanctuary is the only habitat for Asiatic lions.
- Historically, it inhabited much of Western Asia and the Middle East up to northern India.
- On the IUCN Red List, it is listed under its former scientific name Panthera leo persica as Endangered because of its small population size and area of occupancy.
- More than two dozen lions died last year in an outbreak of canine distemper virus (CDV) and Babesiosis.
What is Poonam Avlokan?
It includes two methods:
- Block counting method — in which census enumerators remain stationed at water points in a given block and estimate abundance of lions in that block, based on the direct sighting of lions who need to drink water at least once in 24 hours during the summer.
- Other teams keep moving in their respective territories and make their estimates based on inputs provided by lion trackers and on chance sightings.
Back2Basics: Lion Census in India
- The first Lion Census was conducted by the Nawab of Junagadh in 1936; since 1965, the Forest Department has been regularly conducting the Lion Census every five years.
- The 6th, 8th and 11th Censuses were each delayed by a year, for various reasons.
- This year it was postponed after the lockdown was announced.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Piezo-electric crystals
Mains level: Not much
Indian scientists have found a new process for synthesizing crystalline rubrene for the development of optoelectronic devices and also for preparation of Electronic Skin (E-Skin).
Note the difference between the Pyro-electric/ Piezo-electric/ Pyro-photonic effects. UPSC may shuffle the meaning of such terms in statement based prelims question.
What is crystalline rubrene?
- Crystalline rubrene is a polycyclic aromatic hydrocarbon-based thin film.
- It is a water-free, solvent-free, environmentally friendly one-step plasma process.
- It demonstrated optoelectronic properties (which detect and control light).
- A highly uniform pin-hole-free thin film can be deposited by this process, which is useful for the fabrication of high-end devices.
Working principle
- Devices made of pyro-electric materials (that generate electric charge when they are heated or cooled) and piezo-electric materials (that generate electric charge under the effect of mechanical pressure), can help detect change in temperature and pressure.
- Pyro-electric materials also show pyro-phototronic effect where pyro-electricity is associated with the change in temperature of a material when it absorbs photons.
- Pyro-electric infrared detectors are well known for application in infrared sensing for space research, defense, remote sensing, and household appliances.
Principle application: Human Skin
- These kinds of materials are available in biological systems such as – human skin, plant cellulose leading to their significance in the understanding of basic science of biological systems and also in their huge application prospect.
- The rubrene crystal has a thin amorphous oxide layer formed over the crystalline film.
- This induces surface layer polarization effect leading to pyro-phototronic effect.
Significance of the research
- Since last few years, scientists from around the world are working on the synthesis of organic materials for electronic applications.
- The conventional process for synthesis of organic electronic materials based on chemical processes provides very good quality materials, but the stability of the materials is not very good, and it requires use of solvents.
- Moreover, multiple steps are required for material synthesis and film deposition.
Applications
- This novel process developed by the Indian team is useful for developing advanced optoelectronic devices and preparation of Electronic Skin (E-Skin).
- It may prove to be useful tool for laboratory simulation of different biological systems for probing the organization and dynamics of those systems.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Location of Garsain
Mains level: Issues over multiple capitals
The Uttarakhand Governor has given her assent for declaration of Bhararisen (Gairsain) in Chamoli district as its summer capital.
Practice question:
Q. Discuss the feasibility of having multiple administrative capitals for some states in India.
Gairsain
- Gairsain is situated at the eastern edge of the vast Dudhatoli mountain range, located almost at the centre of the state, at a distance of approximately 250 kilometres from Dehradun.
- It is easily accessible from both the Garhwal and the Kumaon divisions, and in a way, acts as the bridge between the two regions.
- The state Assembly is located in Dehradun, but sessions are held in Gairsain as well.
Why Gairsain is held as summer capital?
- Gairsain was best suited to be the capital of the mountainous state as it was a hilly region falling on the border of Kumaon and Garhwal regions.
- Even when Uttarakhand was carved out as a separate state from UP on November 9, 2000, statehood activists had contended that Gairsain was best suited to be the capital.
- But it was Dehradun in the plains that were named the temporary capital. The issue is largely political.
What are the other examples of multiple capital cities?
- Several countries in the world have implemented the concept.
- In Sri Lanka, Sri Jayawardenepura Kotte is the official capital and seat of the national legislature, while Colombo is the de facto seat of the national executive and judicial bodies.
- Malaysia has its official and royal capital and seat of the national legislature at Kuala Lumpur, and Putrajaya is the administrative centre and seat of the national judiciary.
- Among Indian states, Maharashtra has two capitals– Mumbai and Nagpur (which holds the winter session of the state assembly).
- Himachal Pradesh has capitals at Shimla and Dharamshala (winter).
- The former state of Jammu & Kashmir had Srinagar and Jammu (winter) as capitals (remember Darbar Move).
Also read:
Concept of three capitals in Andhra Pradesh
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: ARPIT
Mains level: Not Much
The Indian Air Force has developed and inducted an Airborne Rescue Pod for Isolated Transportation (ARPIT).
This rescue pod ARPIT can be used as an example of self-sufficiency under the ambitious Atmanirbhar Abhiyan.
What is ARPIT?
- ARPIT is a lightweight isolation system made from aviation certified material.
- It has a transparent and durable cast Perspex for enhanced patient visibility which is larger, higher and wider than the existing models.
- The isolation system caters for the suitable number of air exchanges, integration of medical monitoring instruments, and ventilation to an intubated patient.
- In addition, it generates high constant negative pressure in the isolation chamber for prevention of infection risk to aircrew, ground crew and health care workers involved in air transportation.
- It utilizes High-Efficiency Particulate Air (HEPA) H-13 class filters and supports invasive ventilation using Transport Ventilator.
It’s utility
- This pod will be utilized for the evacuation of critical patients with infectious diseases including COVID-19 from high altitude area, isolated and remote places.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Serotonin
Mains level: Locusts invasion and its threats
Scientists have attempted to answer an important scientific question of how and why locusts collect together by the thousands in order to make a swarm.
Quite often, Oxytocin hormone is seen in the news for its commercial uses and associated ethical concerns. Kindly go through Oxytocin and issues over its commercial use
What causes Locusts to form huge swarms?
- When lone locusts happen to come near each other (looking for food) and happen to touch each other, this tactile stimulation, even just in a little area of the back limbs, causes their behaviour to change.
- This mechanical stimulation affects a couple of nerves in the animal’s body, their behaviour changes, leading to their coming together.
- The central nervous system of the locust, the most important among them being serotonin which regulates mood and social behaviour is the mystery behind swarms.
- Their coming together triggers a mechanical (touch) and neurochemical (serotonin) stimulations to make crowding occur.
What is Serotonin?
- It is a monoamine neurotransmitter.
- It has a popular image as a contributor to feelings of well-being and happiness.
- Its actual biological function is complex and multifaceted, modulating cognition, reward, learning, memory, and numerous physiological processes such as vomiting and vasoconstriction.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Malabar Naval Exercise
Mains level: India-Australia bilateral relations
India is prepared to expand the Malabar trilateral naval exercise involving India, the U.S. and Japan, to permanently include Australia.
Go through the list for once. UPSC may ask a match the pair type question asking exercise name and countries involved.
[Prelims Spotlight] Defence Exercises
About Ex. Malabar
- Exercise Malabar is a trilateral naval exercise involving the United States, Japan and India as permanent partners.
- Originally begun in 1992 as a bilateral exercise between India and the United States, Japan became a permanent partner in 2015.
- Past non-permanent participants are Australia and Singapore.
- The annual Malabar series began in 1992 and includes diverse activities, ranging from fighter combat operations from aircraft carriers through Maritime Interdiction Operations Exercises.
Significance of Australia’s inclusion
- Earlier, India had concerns that it would give the appearance of a “quadrilateral military alliance” aimed at China.
- Now both look forward to the cooperation in the ‘Indo-Pacific’ and the strengthening of defence ties.
- This has led to a convergence of mutual interest in many areas for a better understanding of regional and global issues.
- Both are expected to conclude the long-pending Mutual Logistics Support Agreement (MLSA) as part of measures to elevate the strategic partnership.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Superconductivity
Mains level: Not Much
On a larger scale, electric grids, such as high power lines, lose over 5 per cent of their energy in the process of transmission.
In India, we often get to hear about the transmission losses in DISCOMS. Such losses can be zeroed with the application of superconducting cables (which is practically impossible unless we find a normal working one). The phenomena, superconductivity, however is not new to us, UPSC may end up asking some tricky statements in the prelims regarding it.
Heat losses
Waste heat is all around you. On a small scale, if your phone or laptop feels warm, that’s because some of the energy powering the device is being transformed into unwanted heat.
Where does this wasted heat come from?
- These elementary particles of an atom move around and interact with other electrons and atoms.
- Because they have an electric charge, as they move through a material — like metals, which can easily conduct electricity — they scatter off other atoms and generate heat.
Understanding Superconductivity
- A superconductor is a material, such as a pure metal like aluminium or lead, that when cooled to ultra-low temperatures allows electricity to move through it with absolutely zero resistance.
- Kamerlingh Onnes was the first scientist who figured out exactly how superconductor works in 1911.
- Simply put, superconductivity occurs when two electrons bind together at low temperatures.
- They form the building block of superconductors, the Cooper pair.
- This holds true even for a potential superconductor like lead when it is above a certain temperature.
What are Superconductors?
- Superconductors are materials that address this problem by allowing energy to flow efficiently through them without generating unwanted heat.
- They have great potential and many cost-effective applications.
- They operate magnetically levitated trains, generate magnetic fields for MRI machines and recently have been used to build quantum computers, though a fully operating one does not yet exist.
Issues with superconductors
- They have an essential problem when it comes to other practical applications: They operate at ultra-low temperatures.
- There are no room-temperature superconductors. That “room-temperature” part is what scientists have been working on for more than a century.
- The amount of energy needed to cool a material down to its superconducting state is too expensive for daily applications.
Future scope
- In a dramatic turn of events, a new kind of superconductor material was discovered in 1987 at IBM in Zurich, Switzerland.
- The material was a kind of ceramic. These new ceramic superconductors were made of copper and oxygen mixed with other elements such as lanthanum, barium and bismuth.
- They contradicted everything physicists thought they knew about making superconductors.
- Since then, curiosity regarding the superconductors has been ever increasing.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Pashmina Goats
Mains level: NA
The Chinese Army’s intrusion in Chumur and Demchok has left Ladakh’s nomadic herding Changpa community cut off from large parts of summer pastures.
Pashmina shawl is a landmark product of the Kashmir Valley. But make a note here. It carries only a BIS certification and not a Geographical Indicator.
Also try this PYQ from CSP 2014:
Q. With reference to ‘Changpa’ community of India, consider the following statement:
1. They live mainly in the State of Uttarakhand.
2. They rear the Pashmina goats that yield fine wool.
3. They are kept in the category of Scheduled Tribes.
Which of the statements given above is/are correct?
a) 1 only
b) 2 and 3 only
c) 3 only
d) 1, 2 and 3
Changpa Tribes
- The Changpa of Ladakh is high altitude pastoralists, raising mainly yaks and goats.
- Among the Ladakh Changpa, those who are still nomadic are known as Phalpa, and they take their herds from in the Hanley Valley to the village of Lato.
- Hanley is home to six isolated settlements, where the sedentary Changpa, the Fangpa reside.
- Despite their different lifestyles, both these groups intermarry.
- The Changpa speak Changskhat, a dialect of Tibetan, and practice Tibetan Buddhism.
What is the issue?
- The Chinese Army has taken over 16 kanals (two acres) of cultivable land in Chumur and advanced around 15 km inside Demchok, taking over traditional grazing pastures and cultivable lowlands.
- In a cascading effect, this has resulted in a sharp rise in deaths of young Pashmina goats this year in the Korzok-Chumur belt of Changthang plateau in Ladakh.
- This incursion has destabilized the annual seasonal migration of livestocks, including yaks and Pashmina goats.
Back2Basics: Pashmina
- The Changthangi or Ladakh Pashmina is a breed of Cashmere goat native to the high plateau of Ladakh.
- The much-valued wool from the Ladakh herds is essential for the prized Pashmina shawls woven in Kashmir and famous for their intricate handwork.
- They survive on the grass in Ladakh, where temperatures plunge to as low as −20 °C.
- These goats provide the wool for Kashmir’s famous pashmina shawls. Shawls made from Pashmina wool are considered very fine and are exported worldwide.
- Bureau of Indian Standards (BIS) has recently published an Indian Standard for identification, marking and labelling of Pashmina products to certify its purity.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Deccan Queen
Mains level: NA
The historic Deccan Queen train between Mumbai and Pune completed 90 years on June 1.
Take the opportunity to revise some of reformative measure in the Indian Railways taken through these years. Click here to read more .
The Deccan Queen
- The Deccan Queen was introduced between Mumbai and Pune on June 1, 1930 by the Great Indian Peninsula Railway (GIPR), the forerunner of the Central Railway.
- This was the first deluxe train introduced to serve the two important cities of the region, and was named after Pune – also known as the “Queen of Deccan”.
- It is among the rare Indian trains that have never been hauled using steam traction and were always electric-powered; on rare instances running on diesel.
- The GIPR in the 1940s would run Race Special trains for Mumbai’s horse racing enthusiasts who would come to Pune on weekends and race days.
- This train holds many a record, including that of being India’s first superfast train, first long-distance electric-hauled train, first vestibuled train, the first train to have a ‘women-only’ car, and the first train to feature a dining car.
Back2Basics: Railways in India
- Indian Railways started its service 164 years ago on 16 April 1853.
- The first railway proposals for India were made in Madras in 1832.
- The first train was run over a stretch of 33 kilometres from Mumbai to Thane and was hauled by three steam locomotives named Sahib, Sindh and Sultan.
- Indian Railway now has the 4th largest rail network in the world after the United States of America, China and Russia.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Antifa
Mains level: Racial antagonism across the world
As massive protests following the death of a person in racial discrimination continued to rock the US, President Donald Trump has announced that the alleged far-left group Antifa would be designated as a terrorist organisation by his government.
One can expect a similar prelims question:
Q. The Antifa movement recently seen in news is an: Free trade movement/Anti-terror movement etc.
Why the US seeks to ban Antifa?
- Trump has blamed for the protests that have convulsed cities across the US,
- Antifa is considered the loosely affiliated group of far-left anti-fascist activists.
Antifa: The group
- Antifa is an acronym for ‘Anti-Fascist’. It is not an organisation with a leader nor does it have a defined structure or membership roles.
- Antifa has been around for several decades, though accounts vary on its exact beginnings.
- The term dates the term as far back as Nazi Germany, describing the etymology of ‘Antifa’ as “borrowed from German Antifa, short for antifaschistische ‘anti-fascist’.
- Rather, Antifa is more of a movement of activists whose followers share a philosophy and tactics.
- They have made their presence known at protests, including the “Unite the Right” rally in Charlottesville, Virginia, in 2017.
Its members
- It is impossible to know how many people count themselves as members.
- Its followers acknowledge that the movement is secretive, has no official leaders and is organised into autonomous local cells.
- It is also only one in a constellation of activist movements that have come together in the past few years to oppose the far right.
- Antifa members campaign against actions they view as authoritarian, homophobic, racist or xenophobic.
Activism over years
- Antifa members typically dress in black and often wear a mask at their demonstrations, and follow far-left ideologies such as anti-capitalism.
- The movement has been known to have a presence in the US in the 1980s.
- It shot into prominence following the election of President Trump in 2016, with violence marking some of its protests and demonstrations.
- Criticizing mainstream liberal politicians for not doing enough, Antifa members have often physically confronted their conservative opponents on the streets.
- The group also participates in non-violent protests. Apart from public counter-protests, Antifa members run websites that track white extremist and ultra-right groups.
Criticisms
- The movement has been widely criticised among the mainstream left and right.
- Conservative publications and politicians routinely rail against supporters of Antifa, who they say are seeking to shut down peaceful expression of conservative views.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: D10 Club
Mains level: Not Much
Britain said that it was pushing the U.S. to form a club of 10 nations that could develop its own 5G technology and reduce dependence on Huawei.
We can expect prelims question asking the purpose of the D10 group like-
Q. The D10 Club recently seen in news is a- Environment NGO/ Group of Democracies/ etc.
The D10 Club
- The Britain is proposing a ‘D10’ club of democratic partners that groups the G7 nations with Australia and the Asian technology leaders South Korea and India.
- It would include G7 countries – UK, US, Italy, Germany, France, Japan and Canada – plus Australia, South Korea and India.
- It is aimed for channelling investments into existing telecommunication companies within the 10 member states.
- The group aim to create alternative suppliers of 5G equipment and other technologies to avoid relying on China.
Ruling out Huawei
- Britain has allowed the Chinese global leader in 5G technology to build up to 35% of the infrastructure necessary to roll out its new speedy data network.
- But their PM Boris Johnson was reported to have instructed officials to draw up plans to cut Huawei out of the network by 2023 as relations with China sour.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Dibru-Saikhowa National Park
Mains level: NA
The Oil India Ltd (OIL) leak in Assam has contaminated water bodies that flow into the Maguri Motapung Beel, a large wetland, and the Dibru-Saikhowa National Park (DSNP).
Try this PYQ from CSP 2019:
Q. Which of the following are in Agasthyamala Biosphere Reserve?
(a) Neyyar, Peppara and Shendurney Wildlife Sanctuaries; and Kalakad Mundanthurai Tiger Reserve
(b) Mudumalai, Sathyamangalam and Wayanad Wildlife Sanctuaries; and Silent Valley National Park
(c) Kaundinya, Gundla Brahme-swaram and Papikonda Wildlife Sanctuaries; and Mukurthi National Park
(d) Kawal and Sri Venkateswara Wildlife Sanctuaries; and Nagarjunasagar-Srisailam Tiger Reserve
About Dibru-Saikhowa National Park
- DSNP is a national park in Assam located in Dibrugarh and Tinsukia districts.
- It was designated a Biosphere Reserve in July 1997 with an area of 765 sq.km.
- The park is bounded by the Brahmaputra and Lohit Rivers in the north and Dibru river in the south.
- It mainly consists of moist mixed semi-evergreen forests, moist mixed deciduous forests, canebrakes and grasslands.
- It is the largest Salix swamp forest in north-eastern India, with a tropical monsoon climate with a hot and wet summer and cool and usually dry winter.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Band-tail scorpionfish
Mains level: NA
A rare band-tail scorpionfish was recently found in the Gulf of Mannar.
A stand-alone species being mentioned in the news for the first time (and that too from Southern India) find their way into the prelims. Make special note here. Usually, note the species and its habitat location (IUCN status if available), in the purview of a generic prelims question.
Band-tail scorpionfish
- The band-tail scorpionfish (Scorpaenospsis neglecta) camouflages within the seagrass meadows.
- It is well-known for its stinging venomous spines and ability to change colour.
- The fish has the ability to change colour and blend with its surrounding environment to escape from predators and while preying.
- The fish is called ‘scorpionfish’ because its spines contain neurotoxic venom.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Amaltas Tree
Mains level: NA
The Amaltas or Indian laburnum has begun blooming this summer.
Try this PYQ from CSP 2018:
Q. Why is a plant called Prosopis juliflora often mentioned in news?
(a) Its extract is widely used in cosmetics.
(b) It tends to reduce the biodiversity in the area in which it grows
(c) Its extract is used in the pesticides.
(d) None of the above
Amaltas Tree
- The Amaltas (Cassia fistula linn), native to South-East Asia is one of the most widespread trees in India and South-East Asia, with their presence both in cities as well as in moist and dry forests.
- It has drooping clusters of bright fragrant yellow flowers with five petals and characteristic cylindrical fruits.
- The Amaltas is known by so many names — Indian Laburnum, Golden Shower, Purging Fistula, Pudding-pipe tree, Girmala, Rajbrikh, Alash, Kiar, Kirwara, Ali — showing us how common and loved it is.
- It is both the national tree and the national flower of Thailand and is also the state flower of Kerala.
Features of Amaltas
- This middle-sized deciduous tree is leafless only for a brief time, between March and May.
- The new leaves are glossy, a trait that they lose on maturing, and are mostly bright green, though sometimes a rich copper too.
- It flowers from April to June, partly alongside the emergence of new leaves, but it’s not uncommon to find the Amaltas in flower as late as September.
- The bark is yellowish at first, slowly coarsens with age and turning dark grey.
Significance
- The tree is mostly known to be ornamental and few know of its benefits as a medicinal plant, and one that’s loved by some mammals, bees, and butterflies.
- The bark is used to make dye and the pulp in the fruit pod also serves as a strong purgative agent, which also helps animals that feed on it.
- A medicinal preparation with the roots of the tree is used to cure leprosy and skin diseases and the leaves are used to get rid ulcers, in traditional medicine.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Demo 2 Mission
Mains level: Not Much
NASA’s SpaceX Demo-2 test flight has now been rescheduled for May 31, due to weather conditions. Apart from the test flight itself, what’s getting attention are the spacesuits that the astronauts will wear while travelling in the SpaceX capsule, called Crew Dragon.
Try this question from CSP 2014:
Q. Which of the following pair is/are correctly matched?
| Spacecraft |
Purpose |
| 1. Cassini-Huygens |
Orbiting the Venus and transmitting data to the Earth |
| 2. Messenger |
Mapping and investigating the Mercury |
| 3. Voyager 1 and 2 |
Exploring the outer solar system |
Select the correct answer using the code given below.
a) 1 only
b) 2 and 3 only
c) 1 and 3 only
d) 1, 2 and 3
The SpaceX spacesuit
- The so-called “Starman suits” the astronauts will wear on the Demo-2 mission have been designed by a famous Hollywood costume designer.
- The SpaceX spacesuits are different from other spacesuits typically worn by astronauts because of their sleek design and are being described as resembling a tuxedo.
- These spacesuits are meant to be lighter and more flexible, are equipped with touchscreen gloves, have vents that allow astronauts to be cooler while maintaining pressure inside the suit, and have an incorporated helmet and visor.
- The helmets of these suits are 3D printed with touchscreen-sensitive gloves and the suit is all in one piece, customised for the wearer.
How are launch-and-entry spacesuits different from EMUs?
- The SpaceX suits are only meant to be worn inside the space shuttle and are not suitable for carrying out spacewalks.
- Spacesuits for spacewalks, called Extravehicular Mobility Units (EMUs), are heavier than launch-entry suits (LES) and are already present aboard the ISS.
- While inside the spacecraft, the atmosphere can be controlled, to explore and work in space, humans require that they take their environment with them because there are atmospheric pressure and no oxygen to sustain life.
- Such spacesuits – EMUs — are worn for spacewalks or extravehicular activities (EVA) conducted outside a space shuttle.
- These provide astronauts with oxygen supply and protect them against extreme temperatures, radiation and space dust.
Back2Basics
Demo-2 Mission by SpaceX
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Cordyceps militaris
Mains level: NA
A university in Assam has developed a fungal powder to help people boost their immunity to disease.
Try this question from CSP 2019:
Q.) Recently, there was a growing awareness in our country about the importance of Himalayan nettle (Girardinia diversifolia) because it is found to be a sustainable source of
(a) anti-malarial drug
(b) bio-diesel
(c) pulp for paper industry
(d) textile fibre
A similar question related to Cordyceps militaris can be asked. UPSC may ask whether it is a Fungi, Algae, a Moss or a Lichen.
Cordyceps militaris
- The powder is from a parasitic but rare “super mushroom” called Cordyceps militaris.
- The militaris underwent powdering through lyophilisation or freeze-drying at –80°C.
- The earth has more than 400 species of Cordyceps, a fungus parasitic on insects as well as other fungi.
- Often referred to as a super mushroom, Cordyceps known for its anti-ageing, anti-viral, energy and immunity-boosting effect.
- Natural Cordyceps is hard to get and if dried, costs at least ₹8 lakh per kg.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Asian Koel
Mains level: NA
Asian Koel, the state bird of Puducherry, is now breeding across Delhi-NCR.
For such species, related question, always focus on their habitat, endemic area, IUCN/Wildlife Protection Acr status.
Another caution: Imp birds in the news that are almost “Least Concerned” eg. Amur Falcon (Nagaland), Asian Koel
Asian Koel
IUCN status: Least Concerned
- The Asian Koel (Eudynamys scolopaceus) is a member of the cuckoo order of birds, the Cuculiformes.
- It is found in the Indian Subcontinent, China, and Southeast Asia.
- It forms a superspecies with the closely related black-billed koels, Indian cuckoos, and Pacific koels which are sometimes treated as subspecies.
- The Asian Koel like many of its related cuckoo kin is a brood parasite that lays its eggs in the nests of crows and other hosts, who raise its young.
Key Features
- Sexual dimorphism is evident, where males are a glossy black with a greenish sheen to their bodies and females are brown with white dots on their wings and heavy streaking on their head and throat.
- Both sexes have strong long greenish bills and captivating ruby-red eyes.
- In the bird world, the males are generally more pleasant looking than the females, considering they woo females.
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