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Subject: Science and Technology

  • New study challenges the age of Saturn’s Rings

    Why in the News?

    A new study has challenged previous assumptions, suggesting that Saturn’s rings could be as old as the Solar System (~4.5 billion years old).

    New study challenges the age of Saturn’s Rings

    About Saturn and Its Rings

    • Saturn, the sixth planet from the Sun, is famous for its iconic ring system, made up of billions of ice and rock particles ranging in size from tiny grains to massive chunks.
    • It is primarily composed of water ice (95%), with some dust and rocky debris.
    • The rings are divided into seven main sections (A to G), with gaps like the Cassini Division.
    • Scientists have debated whether the rings formed with Saturn (~4.5 billion years ago) or if they are only 100-400 million years old.
    • Over time, tiny space rocks should darken the rings, yet they remain surprisingly bright.

    Key Findings of the Study:

    • Earlier estimates, based on Cassini data, suggested the rings were 100-400 million years old because they looked clean and bright.
    • The new study suggests that micrometeoroid collisions remove dust efficiently, preventing the rings from darkening over time.
    • High-speed micrometeoroid impacts (~108,000 km/h) cause dust to vaporize, rather than accumulate.
    • The vaporized dust either escapes Saturn’s gravity, falls into the planet’s atmosphere, or gets ejected into space, keeping the rings pristine.
    • 100 million years ago, the Solar System was stable, making ring formation unlikely.
    • 4 billion years ago, the Solar System was chaotic, increasing the chances of violent planetary collisions that could have formed Saturn’s rings.

    Various Missions to Saturn

    Saturn has been explored by multiple spacecraft, each providing valuable insights into its rings, atmosphere, and moons.

    1. Pioneer 11 (1979)

    • First spacecraft to fly past Saturn, capturing basic images.

    2. Voyager 1 & Voyager 2 (1980-1981)

    • Discovered new moons and ring structures.
    • Provided detailed images of Saturn’s rings.

    3. Cassini-Huygens (1997-2017)

    • A NASA-ESA-ASI mission that orbited Saturn for 13 years.
    • Key discoveries:
      • Confirmed liquid oceans on Enceladus.
      • Found methane lakes on Titan.
      • Observed Saturn’s rings losing material into the planet’s atmosphere.

     

    PYQ:

    [2009] Which one of the following planets has largest number of natural satellites or moons?

    (a) Jupiter
    (b) Mars
    (c) Saturn
    (d) Venus

     

  • Nocturnal Bull Ants Navigate Using Polarized Moonlight

    Why in the News?

    Scientists at Macquarie University, Sydney, have discovered that two species of nocturnal bull ants (Myrmecia pyriformis and Myrmecia midas) rely on polarised moonlight for navigation.

    Nocturnal Bull Ants Navigate Using Polarized Moonlight

    What is Polarised Moonlight?  

    • Polarised moonlight refers to moonlight that has undergone scattering in Earth’s atmosphere, causing its waves to oscillate in a specific direction.
    • Unlike direct moonlight, which is unpolarised, the light that scatters in the sky becomes linearly polarised, meaning its electric field aligns in a fixed plane.
    • The moon emits unpolarised light, but when it interacts with air molecules and dust particles in the atmosphere, it scatters and becomes polarised.
    • The intensity of polarised moonlight is much lower than polarised sunlight, making it harder for most animals to detect.
    • The pattern of polarisation in moonlight remains stable, allowing nocturnal animals to use it as a reliable navigation tool.
    • Why is it Important for Navigation?
      • Many nocturnal animals, including bull ants (Myrmecia pyriformis and Myrmecia midas), rely on celestial cues to orient themselves.
      • Unlike the moon’s direct position, which changes with phases and cloud cover, the polarisation pattern remains detectable throughout the night.
      • This enables ants to navigate effectively even under crescent or waning moons, where light intensity is significantly lower.

    E-Vector Pattern and Ant Navigation

    • Polarised moonlight forms a distinct pattern in the sky, known as the E-vector pattern.
    • This pattern shifts based on the moon’s position, but its orientation remains stable, allowing insects like ants to use it as a natural compass.
    • The E-vector pattern aligns at 90° to the moon’s direct light, creating a predictable navigation reference.
    • How do Bull Ants use it?
      • Ants detect the E-vector pattern in the night sky using their specialised compound eyes, which are sensitive to polarised light.
      • Even in dim conditions, they adjust their movements according to the orientation of polarised moonlight.
      • Researchers found that when the E-vector was artificially rotated, the ants changed their paths accordingly, confirming that they rely on this pattern.
      • When the moonlight disappeared (during a new moon phase), the ants struggled to navigate, further proving their dependence on polarised lunar light.

  • [pib] Matsya-6000

    Why in the news?

    India’s 4th generation deep-ocean submersible Matsya-6000 has successfully completed wet testing at Chennai harbor, paving the way for shallow-water demonstrations at depths of up to 500 meters by 2025.

    [pib] Matsya-6000

    About Matsya-6000

    • Made of titanium alloy to withstand extreme oceanic pressure.
    • Built with a 2.1-meter diameter sphere to accommodate three crew members.
    • Moves at speed of 5.5 km/hr using multidirectional thrusters.
    • Uses GPS, underwater acoustic positioning, and joystick-controlled maneuverability.
    • Operates for 12 hours, with an emergency endurance of 96 hours.
    • Includes emergency buoyancy modules and high–pressure-resistant escape hatches.
    • Features robotic arms for sample collection.
    • Uses high–resolution imaging and oceanographic sensors for deep-sea research.
    • Future Trials:
      • Shallow-water tests up to 500m planned by late 2025.
      • Full deep-sea trials at 6,000m scheduled for 2026.

    What is Deep Ocean Mission (DOM)?

      • The DOM launched by the Ministry of Earth Sciences (MoES) in 2021, aims to enhance India’s deep-sea exploration capabilities while supporting the Blue Economy policy.
      • It focuses on resource utilization, climate monitoring, and marine biodiversity conservation.
    • Objectives of DOM:
    • Develop advanced technologies for ocean mining, biodiversity assessment, and deep-sea surveillance.
      • Enable climate change research through real-time ocean data collection.
      • Establish a Marine Station for Ocean Biology for research on marine ecosystems and pharmaceuticals.
      • Support the Samudrayaan Mission, which includes the development of Matsya-6000, India’s first deep-ocean human submersible.
    • Structural Mandate of DOM:
      • Deep-ocean survey and identification of polymetallic nodule and sulfide deposits.
      • Harnessing ocean energy through wave, tidal, and thermal sources.

  • What is the Cancer Vaccine Russia is offering?

    Why in the News?

    In December 2024, Russia announced the development of a new mRNA-based personalized cancer vaccine, with plans to make it available for free to patients by early 2025.

    What is mRNA (Messenger RNA)?

    • mRNA is a type of RNA that transports genetic information from DNA to ribosomes, guiding the production of proteins.
    • It tells the cell which proteins to make by providing the exact sequence of amino acids.
    • Unlike DNA, mRNA does not stay in the cell permanently; it gets degraded after protein synthesis.
    • mRNA-based vaccines (like COVID-19 vaccines) teach cells to produce harmless viral proteins, triggering an immune response.

    What is an mRNA Cancer Vaccine?

    • Unlike traditional vaccines, mRNA vaccines provide genetic instructions to train the immune system to detect and attack cancer cells.
    • This technology gained prominence with the COVID-19 vaccines (Pfizer-BioNTech, Moderna) and is now being adapted for cancer treatment.
    • These vaccines are therapeutic, designed for patients who already have cancer, not for prevention.

    How do mRNA Cancer Vaccines Work?

    • Cancer cells evade the immune system by suppressing immune responses.
      • Immunotherapy works by enhancing the body’s natural ability to detect and destroy these cancerous cells.
    • Unlike chemotherapy, which kills both healthy and cancerous cells, immunotherapy selectively targets only cancer cells, reducing harmful side effects.
    • mRNA cancer vaccines are customized for each patient, targeting specific tumor antigens, making them highly personalized and potentially more effective.
    • While traditional infectious disease vaccines prevent illness, mRNA cancer vaccines are therapeutic, meaning they are administered to patients who already have cancer to help their immune system fight the disease.

    PYQ:

    [2019] RNA interference (RNAi)’ technology has gained popularity in the last few years. Why?

    1. It is used in developing gene silencing therapies.
    2. It can be used in developing therapies for the treatment of cancer.
    3. It can be used to develop hormone replacement therapies.
    4. It can be used to produce crop plants that are resistant to viral pathogens.

    Select the correct answer using the codes given below:

    (a) 1, 2 and 4

    (b) 2 and 3

    (c) 1 and 3

    (d) 1 and 4 only

     

  • Scientists discover ‘Einstein Ring’

    Why in the News?

    The European Space Agency’s (ESA) Euclid Space Telescope has captured a rare Einstein Ring around a galaxy nearly 590 million light-years away from Earth.

    Scientists discover ‘Einstein Ring’

    What is an Einstein Ring?

    • An Einstein Ring is a circular ring of light caused by gravitational lensing, a phenomenon predicted by Einstein’s General Theory of Relativity.
    • It occurs when a massive celestial object (like a galaxy) bends and magnifies light from a more distant background galaxy that lies directly behind it.
    • The recent discovery by ESA’s Euclid telescope identified an Einstein Ring around NGC 6505, located 590 million light-years away, acting as a lens for a distant galaxy 4.42 billion light-years away.
    • Features of an Einstein Ring:
      • Perfect circular shape (only if source, lens, and observer align precisely).
      • Example of strong gravitational lensing, distorting background light.
      • Extremely rare (found in less than 1% of galaxies).
      • Not visible to the naked eye, observed only with advanced space telescopes like Euclid or Hubble.

    Significance of the Discovery:

    • Reveals Dark Matter: Helps indirectly map dark matter, which makes up 85% of the universe.
    • Magnifies Hidden Galaxies: Makes faint, distant galaxies visible for study.
    • Measures Universe’s Expansion: Tracks how light stretches over time, refining cosmological models.
    • Confirms Einstein’s Theory: Proves light bends in curved space-time, supporting gravitational lensing theory.
    • Demonstrates Euclid’s Capabilities: Shows Euclid’s high-resolution potential, promising more discoveries.

    PYQ:

    [2018] Consider the following phenomena:

    1. Light is affected by gravity.
    2. The Universe is constantly expanding.
    3. Matter warps its surrounding space-time.

    Which of the above is/are the prediction/predictions of Albert Einstein’s General Theory of Relativity, often discussed in media?

    (a) 1 and 2 only
    (b) 3 only
    (c) 1 and 3 only
    (d) 1, 2 and 3

     

  • PARAS-2 Spectrograph

    Why in the News?

    Scientists at PRL, Ahmedabad, discovered the exoplanet TOI-6038A b, a dense sub-Saturn-sized planet with a mass of 78.5 Earth masses and a radius of 6.41 Earth radii, using the PARAS-2 spectrograph at Mount Abu Observatory.

    About TOI-6038A b

    • TOI-6038A b is a dense sub-Saturn-sized planet with a mass of 78.5 Earth masses and a radius of 6.41 Earth radii, orbiting a bright, metal-rich F-type star every 5.83 days in a circular orbit.
    • This is the 2nd exoplanet discovery using the PARAS-2 spectrograph.
    • It is also the 5th exoplanet detection combining efforts of PARAS-1 and PARAS-2, showcasing India’s growing expertise in astronomical instrumentation.

    About PARAS-2 Spectrograph:

    • PARAS-2 (PRL Advanced Radial-velocity All-sky Search-2) is a state-of-the-art high-resolution spectrograph designed for exoplanet detection.
    • The development of PARAS-2 began in mid-2018 and was successfully installed at the telescope site in mid-2022.
    • It is the highest-resolution stabilized radial velocity (RV) spectrograph in Asia, operating at a precision level of 30 cm/s.
    • It is installed at PRL’s 2.5-meter telescope at the Mount Abu Observatory, benefiting from high-altitude, clear sky conditions.
    • Key Features of PARAS-2:
      • Operates in the 380-690 nm waveband, making it suitable for studying a wide range of celestial objects.
      • Resolution of ~107,000, the highest in Asia, enabling ultra-precise exoplanetary studies.
      • Ultra-stable temperature and pressure environment: Maintained at 24 ± 0.001 °C and 0.005 ± 0.0005 mbar, ensuring minimal instrumental drift.
      • Uses a Uranium Argon Hollow Cathode Lamp (UAr HCL) for calibration, achieving a velocity precision of better than 2 m/s.
      • Advanced optical fiber system for capturing stellar light and spectral calibration data simultaneously.
    • It uses the radial velocity method, which detects tiny wobbles in a star’s motion caused by the gravitational pull of an orbiting planet.
    • These wobbles cause shifts in the star’s light spectrum, allowing scientists to determine a planet’s presence, mass, and orbital period.
    • It can detect minute stellar movements, making it ideal for finding low-mass exoplanets like super-Earths.

    PYQ:

    [2015] The term ‘Goldilocks Zone’ is often seen in the news in the context of:

    (a) the limits of habitable zone above the surface of the Earth
    (b) regions inside the Earth where shale gas is available
    (c) search for the Earth-like planets in outer space
    (d) search for meteorites containing precious metals

     

  • Reimei: World’s 1st Hybrid Quantum Supercomputer goes Online

    Why in the News?

    Japan has officially launched the world’s first hybrid quantum supercomputer, integrating a 20-qubit quantum processor, Reimei, into Fugaku, the world’s sixth-fastest supercomputer.

    About Reimei

    • Reimei is a 20-qubit trapped-ion quantum computer developed by Quantinuum and integrated into Fugaku, the world’s sixth-fastest supercomputer, at Riken, Japan.
    • It is the first fully operational hybrid quantum supercomputer, combining quantum and classical computing for advanced problem-solving.
    • Key Features:
      • Trapped-Ion Qubits: Unlike superconducting qubits, Reimei uses trapped-ion technology, offering higher stability, longer coherence times, and stronger qubit connectivity.
      • Hybrid Integration: Works alongside Fugaku to solve complex calculations faster than classical supercomputers.
      • Ion Shuttling: Enables physical movement of qubits, allowing for more complex quantum algorithms.
      • Error Correction: Uses logical qubits, reducing error rates 800 times lower than standard qubits.
    • Applications:
      • Physics & Chemistry Research: Used for molecular simulations, material science, and high-energy physics.
      • Quantum Cryptography & AI: Enhances cybersecurity and artificial intelligence models.
      • Optimization & Machine Learning:  Solves large-scale optimization problems.
    • Significance:
      • Bridges classical and quantum computing, serving as a transition to fully scalable quantum systems.
      • Paves the way for real-world quantum applications, accelerating scientific and technological advancements.

    PYQ:

    [2022] Which one of the following is the context in which the term “qubit” is mentioned?

    (a) Cloud Services
    (b) Quantum Computing
    (c) Visible Light Communication Technologies
    (d) Wireless Communication Technologies

     

  • [pib] Nationwide Mass Drug Administration (MDA) Campaign for Lymphatic Filariasis (LF) Elimination 

    Why in the News?

    Union Minister for Health and Family Welfare has launched the Annual Nationwide Mass Drug Administration (MDA) Campaign to eliminate Lymphatic Filariasis (LF).

    About Lymphatic Filariasis (LF):

    • Lymphatic Filariasis (LF), or “Hathi Paon”, is a mosquito-borne parasitic disease caused by Wuchereria bancrofti, Brugia malayi, and Brugia timori.
    • It affects the lymphatic system, leading to swelling of limbs (lymphoedema) and scrotal swelling (hydrocele), causing permanent disability.
    • LF spreads through repeated mosquito bites, making it a major public health challenge in tropical regions, including India.
    • India aims to eliminate LF by 2027, ahead of the 2030 Sustainable Development Goal (SDG) target.

    What is Mass Drug Administration (MDA)?

    • MDA is a large-scale public health campaign where anti-filarial medicines are administered to all eligible individuals in endemic areas to stop LF transmission.
    • Medication Regimens:
      • Double Drug Therapy (DA): Diethylcarbamazine Citrate (DEC) + Albendazole
      • Triple Drug Therapy (IDA): Ivermectin + DEC + Albendazole
    • Key Features of MDA
      • Door-to-door supervised drug administration ensures high coverage.
      • Drugs are safe, free, and given twice a year in targeted districts.
      • MDA is crucial for eliminating LF, as it reduces parasite transmission and protects millions from disability.
    • EXCEPTIONS: Children below 2 years, pregnant women, and seriously ill individuals.

    PYQ:

    [2017] Consider the following statements:

    1. In tropical regions, Zika virus disease is transmitted by the same mosquito that transmits dengue.

    2. Sexual transmission of Zika virus disease is possible.

    Which of the statements given above is/are correct?

    (a) 1 only

    (b) 2 only

    (c) Both 1 and 2

    (d) Neither 1 nor 2

     

  • Genotype D1.1

    Why in the News?

    The US Department of Agriculture has confirmed a new spillover of H5N1 avian flu genotype D1.1 into dairy cattle in the United States.

    What is Genotype D1.1?

    • Genotype D1.1 is a strain of the H5N1 highly pathogenic avian influenza (HPAI) virus, primarily found in poultry and wild birds.
    • It is part of the H5 clade 2.3.4.4b, which has been responsible for multiple outbreaks worldwide.
    • It was recently confirmed in dairy herds in Churchill County, Nevada, USA.
    • Symptoms in Cattle: Includes fever, reduced milk production, coughing, sneezing, and nasal discharge.
    • Differences from B3.13: Genotype B3.13, the previous dominant H5N1 strain in cattle, caused milder infections in humans, whereas D1.1 has led to more severe cases.

    Bird Flu (Avian Influenza) Spillover of H5N1 Virus

    • A spillover event occurs when a virus jumps from its natural host species (wild birds) to other animals or humans.
    • It spreads through wild bird migration routes, carrying the virus across continents.
    • The virus has been detected in unpasteurized milk from infected cows, raising concerns about worker exposure.

    Impacts on India

    • Although genotype D1.1 has not been detected in India, the growing spread of H5N1 in cattle and humans abroad raises concerns for public health and livestock industries in India.
    • India is part of major bird migration routes (Central Asian Flyway & East Asian-Australasian Flyway), making it vulnerable to H5N1 spread from infected wild birds.
    • With India being the world’s largest milk producer, a spillover of H5N1 into dairy cattle could severely impact milk production and exports.
    • While human cases remain rare, a mutation allowing human-to-human transmission could lead to a pandemic-like scenario.
    •  India poultry products exports to Middle Eastern and Asian markets; an H5N1 outbreak could lead to bans and economic losses.

    PYQ:

    [2015] H1N1 virus is sometimes mentioned in the news with reference to which one of the following diseases?

    (a) AIDS

    (b) Bird flu

    (c) Dengue

    (d) Swine flu

     

  • Diagnostic sector requires Regulations

    Why in the News?

    India has around 3,00,000 diagnostic labs, and the number is increasing. However, the sector is largely unregulated, scattered, and concentrated in urban areas.

    What is the significance of India’s Diagnostics Sector?

    • Market Size and Growth: The Indian diagnostics market was valued at approximately US$13 billion in 2023 and is projected to reach US$25 billion by FY28. It is expected to grow at a CAGR of around 14%. Some projections estimate the market could reach US$40 billion by 2034.
    • Essential Component of Healthcare: Diagnostics play a crucial role in disease prevention, early detection, and effective management, making them an essential part of modern healthcare. Doctor recommendations drive a major part of the diagnostic business, with tests being conducted for most patients before prescribing medication.
    • Key Market Segments: The sector is primarily divided into pathology (60%) and radiology (40%). Pathology is further broken down into illness (acute and chronic) and wellness segments.
    • Drivers of Growth: Several factors contribute to the sector’s growth, including increasing life expectancy, a growing middle class, higher penetration of government insurance schemes, rising income levels, and increasing awareness of preventive testing. An aging population and the rise in chronic diseases also fuel the demand for diagnostic services.

    What are the challenges faced by the Diagnostics Sector?

    • Urban-Rural Divide: A significant portion of diagnostics revenue (76%) comes from urban areas, even though 70% of India’s population resides in rural areas.
    • Disparities in Infrastructure: Rural areas have fewer healthcare facilities, with only about 36.5% of the total hospital beds, leading to delayed treatments and poorer health outcomes
    • Regulatory Issues: The Kerala State Clinical Establishments Act faces resistance due to stringent space (300 sq. ft. in rural areas, 500-700 sq. ft. in urban areas) and educational requirements, making compliance unviable for many small labs.
    • Standardization Needs: Lack of uniform testing protocols leads to errors. Example: A government lab in Karnataka reported a platelet count of 0.47 lakh/cmm, but a private lab retest showed 2.2 lakh/cmm, highlighting the need for mandatory NABL accreditation and standard SOPs to ensure diagnostic accuracy.
    • Infrastructure Gaps in Public Sector: Lack of essential upgrades in government labs (e.g., Osmania and Gandhi Hospitals in Hyderabad). Limited operational hours and unavailability of specialists in government hospitals force patients to private facilities.

    What are the present Regulations implemented by the govt for this Sector?

    • Clinical Establishments Act, 2010: This act aims to regulate diagnostic centers but has been adopted by only 12 states and Union Territories, leading to inconsistent regulations across the country.  
    • Medical Devices Rules, 2017: These rules govern medical devices, an integral part of the diagnostics framework, focusing on manufacturing, import, sale, distribution, and quality and safety control. They provide risk-based categorization, establish product standards, and set timelines for obtaining licenses.
    • State-Specific Regulations: Some states like Karnataka and Kerala have separate regulatory frameworks, but enforcement remains inconsistent. Tamil Nadu’s Clinical Establishments (Regulations) Rules, 2018, mandate minimum space requirements for labs.
    • Pricing Regulations for Government-Led Diagnostic Schemes: Limits test costs to reduce out-of-pocket expenses for patients. Example: Telangana’s T-Diagnostics Programme has conducted 18.10 crore tests at subsidized rates, saving ₹1,100 crore for patients.
    • Mandatory Quality Control & External Audits: Enforces periodic inspections to maintain test accuracy. Example: Karnataka’s KPME Act mandates SOPs for sample collection, testing, and reporting, with penalties for non-compliance.

     

    Way forward: 

    • Expand Rural Diagnostic Infrastructure: Strengthen public-private partnerships (PPPs) to enhance diagnostic services in rural areas, improve affordability, and ensure equitable access through mobile labs and telemedicine integration.
    • Enforce Uniform Regulatory Standards: Implement a nationwide mandatory NABL accreditation and standard operating procedures (SOPs) for all diagnostic centers to ensure quality, accuracy, and compliance across states.

    Mains PYQ:

    Q What do you understand by nanotechnology and how is it helping in health sector? (UPSC IAS/2020)