DAILY CURRENT AFFAIRS IAS | UPSC Prelims and Mains Exam – 30th January 2025
Archives (PRELIMS & MAINS Focus) BENNU SAMPLE UNLOCKS SECRETS OF LIFE’S ORIGINS Syllabus: Prelims & Mains – SCIENCE & TECHNOLOGY Context: Studies of rock and dust from asteroid Bennu delivered to Earth by NASA’s OSIRIS-REx spacecraft have revealed molecules that, on our planet, are key to life, as well as a history of saltwater that could have served as the “broth” for these compounds to interact and combine. Background: – The findings do not show evidence for life itself, but they do suggest the conditions necessary for the emergence of life were widespread across the early solar system, increasing the odds life could have formed on other planets and moons. Asteroids like Bennu are remnants from the formation of the solar system, offering a snapshot of conditions that existed more than 4.5 billion years ago. Key takeaways Scientists have revealed that rocks from Bennu contain key components of life: Amino acids, nucleobases and traces of ancient saltwater — the essential ingredients for biological processes. Among the most striking discoveries in the Bennu samples are 14 of the 20 amino acids that life on Earth uses to build proteins, as well as all five nucleobases needed for genetic material like DNA and RNA. However, its amino acids show something unusual. Life on Earth mostly uses ‘left-handed’ amino acids, but Bennu has nearly equal amounts of both left- and right-handed types. The presence of ammonia and formaldehyde — compounds that can react to form more complex molecules — further strengthens the case for asteroids as potential incubators for prebiotic chemistry. Beyond the molecular building blocks, Bennu’s samples also contain traces of water in the form of mineral salts. Scientists detected 11 different evaporite minerals. These minerals suggest that Bennu once harboured briny water that evaporated over thousands, if not millions, of years. Similar salty water reservoirs have been detected elsewhere in the solar system, such as beneath the icy crust of Saturn’s moon Enceladus and on the dwarf planet Ceres. The presence of these minerals on Bennu further supports the idea that watery environments, which could facilitate chemical reactions leading to life, were once widespread. Origins, Spectral Interpretation, Resource Identification, and Security–Regolith Explorer (OSIRIS-REx) The Origins, Spectral Interpretation, Resource Identification, and Security–Regolith Explorer (OSIRIS-REx) is a NASA mission designed to study and return samples from the near-Earth asteroid 101955 Bennu. Key Milestones: Arrival at Bennu: OSIRIS-REx reached Bennu on December 3, 2018, initiating detailed mapping and analysis of the asteroid’s surface. Sample Collection: On October 20, 2020, the spacecraft successfully collected surface material from Bennu using the Touch-And-Go Sample Acquisition Mechanism (TAGSAM). Return to Earth: The sample capsule re-entered Earth’s atmosphere and landed in Utah on September 24, 2023, marking the United States’ first successful asteroid sample return mission. Following the successful delivery of Bennu’s samples, the spacecraft was renamed OSIRIS-APEX (Apophis Explorer). It is now tasked with a new mission to study the asteroid 99942 Apophis during its close approach to Earth in 2029. Source: Down To Earth HIMACHAL LAUNCHES PROJECT FOR CANNABIS FARMING Syllabus: Prelims & Mains – CURRENT EVENT Context: In the wake of popular demand for cultivation of cannabis in the Himalayan state, Chief Minister Sukhvinder Singh Sukhu-led Himachal Pradesh government approved a pilot project for cannabis or hemp cultivation. Background: – Cannabis is a naturally occurring weed found throughout Himachal Pradesh, yet its cultivation had been banned under the Narcotic Drugs and Psychotropic Substances (NDPS) Act, 1985. With this decision, Himachal Pradesh becomes one of the states, along with Uttarakhand, Uttar Pradesh, Madhya Pradesh, Jammu & Kashmir, and Manipur, to grant controlled permission for the cultivation of cannabis for medical and industrial purposes. Key takeaways What does the law say about cannabis cultivation? Cannabis cultivation is largely prohibited in India due to its psychoactive properties. Section 2 of the Narcotic Drugs and Psychotropic Substances (NDPS) Act, 1985, prohibits the production and sale of cannabis resin and flowers. It defines charas as the separated resin, in any form (crude or purified), obtained from the cannabis plant. It also includes concentrated preparations such as hashish oil or liquid hashish. However, it provides exceptions for cannabis cultivation and use for industrial and medicinal purposes under government regulation. Section 10 of the Act allows state governments to regulate, permit, or prohibit cannabis cultivation for medicinal and scientific purposes. Additionally, Section 14 grants the Central government the power to authorise and regulate cannabis cultivation for research or other approved purposes. What is controlled cannabis cultivation? It is the regulated cultivation of specific cannabis varieties having minimal intoxicating properties, along with strict monitoring to prevent misuse. Such varieties are commonly known as hemp. The tetrahydrocannabinol (THC) cannabinoid content (a kind of chemical that has an intoxicating effect) in controlled cannabis should be less than or equal to 0.3 per cent. Under controlled cannabis cultivation, authorities focus on its non-narcotic applications, particularly in the pharmaceutical and industrial sectors. Hemp’s stalks, leaves, and seeds can also be converted into textile, paper, food, cosmetics, biofuel and more. Additionally, cannabidiol (CBD) compounds in the plant are effective in treating chronic pain. Before the tightening of restrictions in 2000, cannabis farming was a common practice in Himachal. Despite the ban, illegal cultivation continues in several districts. Countries like Canada, the United States, Japan, France, Italy, Hungary, China, Denmark, and Australia are leaders in cannabis farming and its processing. Source: Indian Express KARA SEA Syllabus: Prelims – GEOGRAPHY Context: Amid a rapid expansion of Russian activity in the Arctic region, a nuclear-powered icebreaker suffered damage after colliding with a cargo vessel in the Kara Sea. Background: During the winter, nuclear icebreakers frequently accompany oil tankers and LNG carriers across the waters of the Arctic. Key takeaways The Kara Sea is a marginal sea of the Arctic Ocean, located to the north of Siberia, Russia. Location: The Kara Sea is bordered by the Novaya Zemlya archipelago to the west, the Severnaya Zemlya archipelago to the east, and the Franz Josef Land to the northwest. Climate Ice Cover: The Kara
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