All articles tagged with #water
Researchers at the University of Osaka use an AI framework to compare 16 descriptors of water’s local structure in the supercooled regime, training on molecular dynamics data to identify which descriptors best distinguish high-density and low-density water structures as temperature varies, aiding understanding of water’s unusual thermodynamics.
Pooling 10 UK studies (1,252 people) found that outdoor exercise in nature tends to lift mood and self-esteem, with the biggest self-esteem boost from just five minutes; settings that include water boosted the effect more than green-only areas. The gains are modest but consistent, showing a dose–response where shorter sessions can be more impactful, and while the mechanism isn’t known, the result suggests brief outdoor activity could offer public-health benefits.
A new study identifies eight accessible Martian cave-like features in Hebrus Valles that could be karstic—formed by water dissolving soluble rock rather than by lava tubes—potentially revealing a subsurface record of past fluids and offering sheltered spaces for future exploration, though the evidence is orbital and multiple formation processes could explain the shapes, so confirmation awaits in-situ observations.
A Nature Physics study used an unsupervised AI trained on 74 million simulated water configurations to uncover two distinct molecular arrangements in liquid water—Structure A dense and disordered, Structure B light and ordered—that continually swap across various temperatures and pressures. This supports the long-suspected two-structure theory and paves the way for experimental validation of water’s dual structure.
NASA’s Lucy mission found that the main-belt asteroid Donaldjohanson is a bilobed, peanut-shaped body with a complex tumbling rotation gradually altered by sunlight (the YORP effect). Close flyby data revealed iron-rich clays that formed in the presence of liquid water, suggesting water briefly existed on its parent body long ago. At about 155 million years old, Donaldjohanson is younger than Bennu and Ryugu and has stayed in the main belt, offering a contrast as Lucy heads toward studying Jupiter’s Trojan asteroids, starting with Eurybates in 2027.
NASA’s Perseverance has found the highest concentration of organic molecules yet in Jezero crater’s mudstones, hinting at fossilized microbes on Mars; archaeologists report that all Homo naledi remains from the Rising Star cave system in South Africa are female; new AI-assisted research suggests water may consist of two interchanging liquids, challenging a single-liquid view of the substance; JWST observations illuminate how early galaxies formed and evolved (dying young), and Euclid has produced the most detailed image of the Milky Way yet, with a separate note of a newly forming star in Orion.
New models argue a substantial portion of solar-system water—roughly 30–50%—was inherited from pre-solar interstellar ice, not formed in the early solar disk; the deuterium enrichment seen in solar-system water is hard to explain with disk chemistry alone, suggesting some water in Earth’s oceans and comets predates the Sun by billions of years and carries ancient interstellar heritage.
Researchers used unsupervised deep learning to analyze massive molecular‑dynamics simulations and found AI-identified coordinates that show water switching between high‑density and low‑density structures. They uncovered two switching routes: a dominant semi‑loop path with a single energy barrier, and a near-boundary full‑loop path with three barriers. Published in Nature Physics, the work strengthens the long‑standing two‑state theory and could help explain water’s anomalies and inform fields like biology, drug development, and energy, though experimental confirmation remains needed.
Water is argued to be the most valuable space resource because, when split into hydrogen and oxygen, it becomes rocket propellant that can be produced in orbit from solar energy. A propellant depot in orbit would sell to outbound missions (Moon, Mars, and beyond) rather than Earth, since launching propellant from Earth is costly. The near-term path focuses on lunar water ice and Artemis tests, while asteroid mining remains uncertain. The key test is whether space-made propellant can beat Earth-launched propellant; until then water is valuable mostly in theory. Past ventures into space mining failed to mature, and the market for in-space refueling remains unproven.
AI-assisted analysis of massive molecular-dynamics simulations provides evidence for water’s long-sought two-liquid picture—the coexistence and interconversion of high-density and low-density local structures—with two distinct energy-barrier pathways that depend on temperature, strengthening the two-state hypothesis and potentially explaining water’s anomalous behavior and its role in biological systems.
A 17-year-old Florida boy contracts a rare Vibrio vulnificus infection from a park swim, facing potential limb amputation as doctors treat him at a Pensacola children’s hospital while his family raises funds on GoFundMe.
In a Guardian long-form essay, Mark Arax tracks California’s history of extraction—from the Gold Rush and hydraulic mining to modern groundwater pumping and a flood of AI-driven data centers—arguing that state policy and powerful interests turn water, land, and even human cognition into commodities, fueling environmental ruin and rural displacement even as leaders preach “abundance.”
Scientists are re-evaluating Earth's water origins: comet and asteroid theories are challenged by mismatched deuterium signatures, while experiments on hydrogen reacting with melted rock under high pressure suggest a planet’s own magma ocean could generate vast amounts of water, implying Earth might have formed much of its oceans internally—though the reality may involve a mix of sources and remains unsettled.
Seismic data from NASA’s InSight reveal a large underground reservoir of liquid water deep beneath Mars, while MIT researchers link the missing atmosphere to methane trapped in smectite clay formed by water-rock interactions—potentially storing around 1.7 bar of CO2, about 80% of Mars’s lost atmospheric inventory. If confirmed, both water and atmospheric gas could still lie beneath the crust, offering targets for future exploration and resource use, though extraction would be challenging.
In a Danish study of over 54,000 adults followed for up to 27 years, nitrate from vegetables was linked to a lower dementia risk, while nitrate and nitrite from red/processed meat and from drinking water were linked to higher risk. The protective vegetable effect may come from antioxidants that aid nitric oxide formation and block harmful N-nitrosamines, whereas meat lacks these protections and water nitrate could form N-nitrosamines in the body. The study is observational, so it cannot prove causation, and regulators may need to re-evaluate drinking-water nitrate limits, though the overall benefits of drinking water remain.