Ancient Stone Tools Push Back Timeline of Human Ocean Crossings by Millions of Years

Archaeologists have discovered stone tools on Indonesia’s Sulawesi island that are at least 1.04 million years old, possibly dating to 1.48 million years ago. This finding dramatically pushes back evidence of early human sea crossings, as Sulawesi has always been surrounded by deep, fast-moving waters that would have required ocean travel to reach. The tools represent “by far the earliest known evidence for the presence of early humans (hominins) on Sulawesi.” Researchers believe Homo erectus likely made these tools, possibly reaching the island accidentally by clinging to logs during tsunamis rather than using boats. The discovery joins similar findings on nearby Flores and Luzon islands, suggesting a pattern of early hominins crossing the Wallace Line into isolated island populations. No hominin fossils have been found on Sulawesi yet, leaving the toolmakers’ exact identity mysterious. (Science Focus)

Sea-Level Sentinel-6B Arrives in California for 2025 Launch
The second satellite in the Sentinel-6/Jason-CS sea-level mission, Sentinel-6B, has arrived at its California launch site to begin final processing for a late-2025 liftoff. The spacecraft will extend the three-decade global record of sea-surface height that underpins climate models, hurricane intensity forecasts, and coastal flood planning. Paired with its predecessor, Sentinel-6 Michael Freilich, the mission will ensure continuity of high-precision radar altimetry well into the 2030s. Engineers will perform checkouts, fueling, and encapsulation before integration with its launch vehicle. The mission is a partnership among NASA, ESA, EUMETSAT, and CNES, with data freely available to researchers and operational users worldwide. Consistent, overlapping measurements are critical for trend detection as thermal expansion and land-ice melt push seas higher. (NASA)

Webb Spots a New Uranian Moon, S/2025 U1
JWST imaging has revealed a previously unknown Uranus satellite, provisionally designated S/2025 U1. Captured in NIRCam observations that also resolved numerous known moons, the object’s repeated appearance at consistent positions indicates an orbiting body rather than a transient artifact. Follow-up measurements will refine its orbit, size, and reflectivity, helping scientists test ideas about how Uranus’s complex satellite system formed and evolved. The find underscores Webb’s growing role in Solar System science: its sensitivity and resolution allow faint, small moons to be picked out against glare from bright primaries and rings. Researchers say additional Webb campaigns could uncover more bodies and ring structures, informing models of collisional history and migration in the ice-giant realm. (NASA)

Country-Scale Radio Arrays Target Ultra-High-Energy Neutrinos
Scientists are planning enormous, sparse networks of radio antennas—stretching over vast areas—to catch the rarest, highest-energy neutrinos and trace them back to their extreme cosmic accelerators. These proposed “country-size” detectors would listen for brief radio pulses created when neutrinos interact in ice, desert soils, or the atmosphere, complementing instruments like IceCube that work at lower energies. Beyond opening a new window on the most violent phenomena in the universe, the arrays could help map how cosmic rays are accelerated and transported across intergalactic space. The effort faces technical, logistical, and funding hurdles, but several pathfinder deployments are informing design choices, siting, and costs ahead of go/no-go decisions. (Science)

HHS Veterans Urge Action After Atlanta CDC Attack
More than 800 current and former staff from CDC, NIH, and HHS signed a public letter following the August 8 armed attack at CDC’s Atlanta campus, warning that escalating anti-science rhetoric endangers workers and national health security. Addressed to HHS Secretary Robert F. Kennedy Jr. and Congress, the signatories call for steps by September 2: stop spreading inaccurate health information, affirm the CDC’s integrity, and guarantee workforce safety. The letter criticizes actions such as canceling mRNA vaccine contracts and replacing vaccine advisory processes, saying such moves fuel harassment of public-health professionals. The signatories—many anonymous over safety concerns—also honor Officer David Rose, killed responding to the attack, and urge rapid measures to protect agencies’ missions. (CIDRAP)

IBM and NASA Unveil Surya, an Open AI Model for Solar Storm Forecasts
IBM and NASA introduced Surya, an open-source foundation model trained on years of Solar Dynamics Observatory imagery to improve space-weather prediction. According to the announcement, Surya boosts solar-flare classification accuracy by 16% and, for the first time, delivers high-resolution forecasts that can indicate where flares may erupt up to two hours ahead—information vital for safeguarding satellites, aviation, power grids, communications, and GPS-dependent services. The model—released to researchers to spur further advances—joins earlier IBM-NASA geospatial AI collaborations and reflects a push toward data-driven heliophysics. As solar activity ramps toward peak levels, more accurate short-term forecasts could mitigate economic risks from severe storms and support operational decision-making across critical infrastructure. (Space Daily)

African Heat Waves Are Getting Hotter, Longer, and More Frequent
A new analysis of four decades of observations finds that heat waves across Africa are intensifying and lengthening, primarily due to increased greenhouse-gas and black-carbon emissions. Published in Communications Earth & Environment, the study details how changing frequency and severity are reshaping risk profiles across regions, with consequences for public health, agriculture, and energy demand. The authors argue that better early-warning systems and adaptation strategies are urgently needed, given rapid urbanization and uneven access to cooling. They also emphasize the importance of reducing soot and other short-lived climate pollutants alongside CO₂ cuts to curb extremes. The work adds continent-wide context to documented local and regional heat-wave trends. (Phys.org)

Ozone’s Climate Punch May Be Larger Than Expected
New modeling suggests ozone will contribute more to global warming than previously estimated as the layer recovers while interacting with evolving air-pollution patterns. The simulations, published in Atmospheric Chemistry and Physics, indicate that although the Montreal Protocol successfully phased out many ozone-depleting substances, the net climate benefit may be smaller than assumed. That’s because tropospheric ozone—a greenhouse gas—could rise under certain emissions scenarios, adding to warming. The results, based on mid-century projections, underscore how intertwined air-quality and climate policies are and why integrated strategies matter. The authors caution that uncertainties remain but say policymakers should account for ozone’s warming effects in mitigation planning. (Phys.org)

New Rapid-Response Protocol Aims to Catch Supernovae at First Light
Astronomers have outlined a coordinated, rapid-response observing protocol to obtain spectra of thermonuclear supernovae within 24–48 hours of initial brightening—crucial for identifying progenitors and early explosion physics. Reported in Journal of Cosmology and Astroparticle Physics, the framework leverages automated triggers, global telescope networks, and standardized data-sharing to reduce delays between discovery and follow-up. Early spectra can reveal unburned material, shock-interaction signatures, and composition gradients otherwise lost within days, improving models of white-dwarf detonations and their use as cosmological distance markers. The approach also sets best practices for resource allocation during crowded transient seasons as time-domain astronomy accelerates. (Phys.org)

China’s Solar Buildout Surges as Emissions Edge Down in Early 2025
China is rapidly expanding solar capacity—including projects billed as the world’s largest—as a new study finds national carbon emissions dipped about 1% in the first half of 2025 compared with a year earlier. Analysts cite a record pace of renewables deployment alongside industrial slowdowns in some sectors. The article notes continuing debates about power-grid readiness and the need for storage and flexible generation to integrate new solar. Still, the investment momentum suggests a structural shift toward cleaner electricity, with implications for global emissions trajectories and supply chains. The findings add context to policy moves that aim to peak emissions before 2030. (U.S. News)

West Virginia Opens Rural Broadband Funds to Satellite—Barely
West Virginia has joined a handful of states allowing a small slice of rural broadband subsidies to support satellite service in hard-to-reach areas. The policy recognizes that mountainous terrain and sparse populations can make fiber or fixed-wireless builds uneconomical, even as critics warn satellites should not displace investments in high-capacity terrestrial networks. The move could help cover edge cases swiftly while larger projects progress, and is being watched by providers and state officials nationwide as BEAD-funded deployments advance. The “tiny share” approach attempts to balance universal service goals with long-term infrastructure priorities amid rising demand for reliable connectivity. (Science News)

Vitamin D Supplement Shown to Slow Biological Aging by Preserving Telomeres

A major clinical trial from the VITAL study—conducted by researchers at Mass General Brigham and the Medical College of Georgia—shows that daily vitamin D₃ supplementation (2,000 IU/day) can significantly slow telomere shortening, a key marker of biological aging. In a randomized, double‑blind, placebo-controlled sub‑study involving 1,054 U.S. adults aged 50 and older, participants taking vitamin D₃ lost less telomere length over four years compared to the placebo group—equating to nearly three years’ worth of aging. Importantly, omega‑3 supplements showed no measurable impact on telomere length. This is the first large-scale, long-term RCT to demonstrate that vitamin D supplementation can preserve telomeres, potentially offering a strategy against aging and age-related diseases. The authors stress that further research is needed to confirm and extend these findings. (Science Daily)