Recent reporting, background, and summaries from the science desk.
Scientists have unearthed Brazil's first tektite field, a massive 900-kilometer expanse of mysterious glassy fragments dubbed "geraisites." These unique "geraisites" formed 6.3 million years ago from a powerful extraterrestrial impact, offering crucial new insights into South America's ancient geological history and adding Brazil to a select global group of major tektite sites.
Researchers at UC Berkeley have uncovered a microbe, *Methanosarcina acetivorans*, that challenges a fundamental genetic principle by interpreting a "stop" codon as an instruction to insert an unusual amino acid and continue protein synthesis. This discovery reveals a surprising flexibility in the genetic code, overturning long-held beliefs about its rigidity and opening new avenues for understanding genetic disorders.
Scientists have discovered "bizarre, plume-like swirls" deep beneath Greenland's ice sheet, a thermal convection phenomenon likened to a "pot of boiling pasta." This groundbreaking observation reveals ice is softer and more sensitive to stress than previously thought, significantly impacting predictions for global sea-level rise and the stability of the massive ice sheet.
A groundbreaking NASA study reveals that essential protein building blocks can survive for tens of millions of years within pure Martian ice, even amidst cosmic radiation, suggesting ancient life's traces might be remarkably preserved. This pivotal discovery urges future missions to prioritize drilling into buried ice caps rather than just rocks, offering a compelling new strategy to uncover definitive signs of extraterrestrial life.
NASA's Artemis II moon rocket is being rolled back from the launch pad to the Vehicle Assembly Building on February 25 due to a critical helium system issue and adverse weather, a 12-hour journey. This setback will delay the highly anticipated crewed mission around the Moon until at least April 2026, pushing back humanity's first lunar flight in over half a century.
A groundbreaking 30-year analysis, utilizing space lasers, reveals a significant acceleration in global sea-level rise, with oceans increasing by approximately 90 millimeters since 1993. This alarming trend is primarily driven by melting land ice, rather than thermal expansion, underscoring the intensifying impact of climate change.
A groundbreaking study from Harvard T.H. Chan School of Public Health reveals that U.S. counties closer to operational nuclear power plants exhibit higher cancer mortality rates, a concerning finding that persists even after accounting for various socioeconomic and environmental factors. While emphasizing this significant association doesn't establish a direct causal link, the research critically underscores the urgent need for further investigation into nuclear energy's potential health impacts amidst growing global interest.
Scientists at Stanford University have achieved a significant breakthrough by creating the first global map of rare earthquakes occurring deep within Earth's mantle, a phenomenon long debated and difficult to confirm. This groundbreaking research, which identified 459 such events since 1990, offers crucial insights into the crust-mantle boundary and the upper mantle's role in seismic activity, particularly in regions like the Himalayas.
A newly discovered giant virus, ushikuvirus, found in Japan, is challenging long-held theories about the origin of complex life. This amoeba-infecting virus offers unique insights by connecting different giant DNA virus families and suggesting how viruses might have influenced the evolution of the cell nucleus.
NASA is conducting a crucial second wet dress rehearsal for its Artemis 2 mission, a high-stakes fueling test designed to resolve persistent hydrogen leaks and other issues that plagued a previous attempt. This intensive 50-hour countdown, involving over 700,000 gallons of supercold propellants, is a vital step toward the first crewed lunar mission since Apollo 17 and will determine the feasibility of a March launch for the four astronauts.
American biologist Toby Kiers has been awarded the prestigious 2026 Tyler Prize for Environmental Achievement, often dubbed the "Nobel of the Environment," for her groundbreaking research into the vital role of plant and fungal networks in soil. Her nearly three decades of work have illuminated their global impact on carbon regulation and biodiversity, inspiring her advocacy for integrating this "invisible biodiversity" into climate action plans, an effort recognized with a $250,000 prize.
Scientists have potentially discovered an ultra-fast pulsar near Sagittarius A*, the supermassive black hole at the Milky Way's center, completing a rotation every 8.19 milliseconds. This remarkable find offers a unique opportunity to study space-time under extreme gravitational forces, potentially yielding crucial insights into Einstein's General Theory of Relativity.