Science & Technology Current Affairs MCQs

Notes:
A new non-contact wearable device developed by researchers from the United States and South Korea can monitor health by measuring skin flux without touching the skin. The device is about the size of a smartphone and tracks molecular movements like vapour leaving the body and chemicals entering through the skin. It was developed under the leadership of Professor John A. Rogers at Northwestern University, USA. It creates a small sealed microclimate next to the skin and uses wireless electronics and tiny sensors to detect water vapour, carbon dioxide (CO₂), and volatile organic compounds (VOCs). A remote-controlled valve adjusts the chamber’s openness for accurate comparisons.

Notes:
Kosmos 482 was a Soviet-era Venus lander launched on March 31, 1972, as part of the Venera space program. Its mission was to land on Venus, but a rocket malfunction left it stranded in Earth’s orbit. After orbiting Earth for over 50 years, the 500-kg lander module is expected to re-enter Earth’s atmosphere around May 10, 2025. The spacecraft has been circling the planet for decades, marking an unusual journey in space history. Its re-entry marks the end of a long-lived mission that never reached its intended destination.

Notes:
Indian and US researchers have recently discovered a new subtype of Maturity-Onset Diabetes of the Young (MODY), a rare, inherited form of diabetes. MODY is caused by genetic mutations that lead to impaired insulin production or function. It is typically diagnosed in adolescents or young adults under 35 years of age, without significant obesity. The discovery was made by researchers from the Madras Diabetes Research Foundation (MDRF) in Chennai and Washington University School of Medicine in St. Louis. This breakthrough could change the way certain forms of MODY are diagnosed and treated, offering better solutions for patients. MODY is divided into 14 subtypes, each linked to different gene mutations.

Notes:
Kerala recently reported a new case of Nipah virus infection, highlighting the state’s renewed struggle with this rare and deadly zoonotic virus. The Nipah virus, according to the World Health Organization (WHO), is a newly emerging zoonosis, meaning it is transmitted from animals to humans. The virus primarily spreads through fruit bats and contaminated food, making it a significant public health threat. Nipah virus infection progresses rapidly, and there is no specific treatment available for it. The virus is known for its high fatality rate and the potential for human-to-human transmission.

Notes:
Scientists recently developed a new technique called Light-microscopy-based Connectomics (LICONN) to map brain cell connections using light microscopes. LICONN was developed at the Institute of Science and Technology Austria (ISTA). It allows mapping of brain’s complex neural networks at the nanoscale and also identifies specific molecules in those connections. LICONN combines light microscopy with hydrogel expansion, fluorescent stains, artificial intelligence (AI), and analytical methods. Brain tissue is soaked in a special gel that expands it 16 times, making tiny structures visible under light microscopes. It is the first method after electron microscopy (EM) that can reconstruct all synaptic connections between neurons.

Notes:
Researchers have recently found that magnetar flares can create heavy elements like gold using a process called rapid neutron-capture or r-process nucleosynthesis. Magnetars are a special type of neutron star with extremely powerful magnetic fields—about a thousand times stronger than normal neutron stars. These stars sometimes release huge flares of energy, and one such giant flare in 2004 helped scientists make this discovery. The flare was observed by NASA’s Compton Gamma Ray Observatory, which recorded strange gamma-ray signals nearly a day later. These delayed signals did not match typical afterglows but showed signs of radioactive decay from neutron-rich elements. This proves that r-process nucleosynthesis, earlier linked mainly to neutron star mergers, can also happen in magnetar flares. This recent evidence changes our understanding of where rare elements like gold in the universe might come from.

Notes:
The MADMAX collaboration recently published the first results of its search for dark photons using a prototype detector. MADMAX stands for Magnetised Disk and Mirror Axion Experiment. It is a research project focused on detecting dark matter particles like axions and dark photons. The MADMAX detector uses a system made of sapphire disks and a mirror to form a resonator that enhances detection signals. Dark photons are theoretical particles similar to light particles (photons) but have mass. They are believed to be part of galactic dark matter and can turn into ordinary photons under special conditions.

Notes:
On April 2, 2025, the National Aeronautics and Space Administration (NASA) reported that asteroid 2024 YR4 has a 3.8% chance of hitting the Moon on December 22, 2032. YR4 is a Near-Earth Asteroid (NEA) discovered in December 2024 using the Asteroid Terrestrial-impact Last Alert System (ATLAS) telescope in Chile. It is classified as a Near-Earth Object (NEO) because its orbit brings it close to Earth—within 1.3 times the Earth-Sun distance. In February 2025, YR4 triggered NASA’s highest-ever asteroid impact alert. Infrared data from the James Webb Space Telescope estimates its size at around 65 metres, similar to a 10-storey building. Since it is below 140 metres in size, it is not labeled a “Potentially Hazardous Asteroid.” Earlier, it had a 1% chance of hitting Earth, but updated analysis now shows almost no threat to our planet.

Notes:
India has launched its first 3-nanometre (3nm) chip design centres in Noida and Bengaluru, marking a major step in advanced semiconductor development. These centres have been set up by Renesas Electronics India Private Limited, placing India among a few nations working on next-generation chip design. The initiative is part of a broader government plan to build a complete semiconductor ecosystem including design, fabrication, ATMP (Assembly, Testing, Marking, and Packaging), and supply chain support.

Notes:
In a recent development, India’s High-Altitude Platform (HAP) prototype designed by National Aerospace Laboratories (NAL) successfully completed pre-monsoon flight tests with a certified autopilot system. A High-Altitude Platform (HAP) is an unmanned, solar-powered aircraft that flies in the stratosphere at 17 to 22 kilometers altitude. It serves as a middle layer between ground systems and satellites for continuous aerial services. It was developed by NAL, Bengaluru, under the Council of Scientific and Industrial Research (CSIR). The Aeronautical Test Range (ATR) at Chitradurga, Karnataka supported its development. It is designed for border patrolling, surveillance in remote areas, and civil-military use. It can also act as a relay for telecommunications and weather monitoring.