分类： science

ABU DHABI, United Arab Emirates — Arctic seals and bird populations are facing escalating threats primarily driven by climate change and human activities, according to the latest update from the International Union for Conservation of Nature (IUCN). The IUCN’s updated Red List, released on Friday, highlights the precarious status of these species, with habitat loss, global warming, and maritime traffic identified as key factors.

The United States National Weather Service (NWS) confirmed on Thursday that La Nina, a natural climate phenomenon, has re-emerged. However, its weak intensity is expected to minimize its cooling effect on global temperatures and its influence on Atlantic hurricane activity. La Nina, characterized by cooler-than-average sea surface temperatures in the central and eastern equatorial Pacific Ocean, typically alters atmospheric wind patterns, leading to increased hurricane activity in the Atlantic basin and reduced activity in the Pacific. This cyclical pattern oscillates between La Nina, its counterpart El Nino, and neutral phases. After a brief La Nina episode from December 2024 to March 2025, neutral conditions prevailed until the recent resurgence of La Nina in September 2025. The NWS predicts that La Nina will persist through the winter, with a 55% chance of transitioning back to neutral conditions between January and March 2026. Despite its historical impact on global weather, this La Nina event is expected to be too weak to significantly affect conventional winter weather patterns. The 2020–2023 La Nina was notable for its unprecedented duration, marking the first ‘triple-dip’ event of the 21st century. While La Nina typically cools global temperatures, it failed to counteract the trend of record-breaking heat observed over the past decade. The Atlantic hurricane season, which runs from June 1 to November 30, has been slightly below average so far, with no storms making landfall in the United States. Nevertheless, the National Oceanic and Atmospheric Administration (NOAA) continues to forecast an above-normal hurricane season.

STOCKHOLM, Sweden — The 2025 Nobel Prize in Physics has been awarded to John Clarke of the United Kingdom, Michel Devoret of France, and John Martinis of the United States for their pioneering work in quantum mechanics, which has revolutionized digital technology. Their discoveries have laid the foundation for advancements in quantum cryptography, quantum computers, and quantum sensors, transforming fields ranging from telecommunications to computing.

The Nobel Committee highlighted that their research demonstrated quantum tunneling on a macroscopic scale using superconductors, a breakthrough that has made quantum mechanics accessible and measurable in human terms. Ulf Danielsson, secretary of the Nobel physics committee, emphasized the significance of their experiments in the 1980s, which bridged the gap between theoretical physics and practical applications.

Quantum mechanics, which governs the behavior of particles at the smallest scales, underpins all modern digital technology. For instance, the functionality of mobile phones is directly linked to their discoveries. Clarke, a professor at the University of California, Berkeley, described the award as ‘the surprise of my life,’ noting that the practical implications of their work were not immediately apparent during their experiments.

The trio’s collaboration exemplifies the global nature of scientific research. However, their work also underscores the ‘brain drain’ phenomenon, as Devoret and Martinis conducted their research in the United States, a hub for scientific innovation due to its investment in basic science and academic freedom. Eleanor Crane, a quantum physicist at King’s College London, pointed out that recent U.S. budget cuts to science programs threaten to erode this leadership.

The physics prize follows the Nobel in Medicine, awarded to a US-Japanese trio for their work on the human immune system. The Nobel season continues with awards in chemistry, literature, peace, and economics, culminating in the formal ceremonies on December 10, the anniversary of Alfred Nobel’s death. Each laureate receives a diploma, a gold medal, and a share of the $1.2-million prize.

A groundbreaking study published on Friday has revealed that humans may have diverged from our ancient ancestors 400,000 years earlier than previously believed, and in Asia rather than Africa. The findings, based on a digital reconstruction of a million-year-old skull discovered in China in 1990, could reshape our understanding of human evolution and resolve the so-called ‘Muddle in the Middle’ period of human history. The skull, labeled Yunxian 2, was initially thought to belong to Homo erectus, an early human ancestor. However, advanced reconstruction technologies, including CT scanning and virtual modeling, revealed features more closely aligned with later species such as Homo longi and Homo sapiens. Chris Stringer, an anthropologist at London’s Natural History Museum and a member of the research team, stated, ‘This changes a lot of thinking. It suggests that by one million years ago, our ancestors had already split into distinct groups, pointing to a much earlier and more complex evolutionary split than previously believed.’ The study, published in the journal Science, also challenges the long-held assumption that early humans dispersed exclusively from Africa. Michael Petraglia, director of Griffith University’s Australian Research Centre for Human Evolution, noted, ‘There’s a big change potentially happening here, where east Asia is now playing a very key role in hominin evolution.’ However, some experts remain skeptical, cautioning that the findings are likely to be disputed. Andy Herries, an archaeologist at La Trobe University, argued that fossil morphology alone may not be a reliable indicator of human evolution, emphasizing the importance of genetic analysis. The study underscores the complexity of human origins and highlights the need for further research to unravel the mysteries of our evolutionary past.