Uneven attention to climate tipping points.

October 6, 2026| Source: Proceedings of the National Academy of Sciences of the United States of America

Climate tipping points have moved from theoretical concern to a practical challenge for climate-risk assessment and governance. Yet whether scientific attention is aligned with risk-relevant characteristics of climate tipping elements (CTEs) has not been systematically assessed. Across 20,736 CTE-specific records spanning 2000-2025 and addressing 14 tipping elements, attention was concentrated on the Greenland Ice Sheet and Atlantic Meridional Overturning Circulation, while Boreal Permafrost (abrupt thaw) and the North Atlantic Subpolar Gyre received comparatively limited attention despite their relatively low estimated warming thresholds. Explicit engagement with risk-relevant tipping dynamics, including abrupt transitions, hysteresis, or irreversibility, was also limited. These patterns may influence which tipping risks can be most readily assessed, prioritized, and governed.

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Continuous UV irradiation played an inconclusive role in selecting the canonical genetic alphabet.

An abundance of heterocyclic molecules analogous to canonical nucleobases (i.e., adenine, thymine, guanine, cytosine, and uracil) used as the genetic alphabet in DNA and RNA could have been present in various prebiotic environments on early Earth. However, extant biology generally uses the canonical nucleobases and nucleosides as the genetic alphabet, and not any number of possible noncanonical counterparts. Ultraviolet (UV) irradiation was likely abundant on the surface of the early Earth and h

EnvironmentOctober 13, 2026

Fault-controlled natural hydrogen reservoirs as underground hydrogen storage sites.

Underground hydrogen storage requires geological formations with demonstrated hydrogen containment, yet no conventional storage candidate (salt caverns, aquifers, or depleted hydrocarbon reservoirs) offers direct, prior evidence of H 2 -specific sealing. We propose that subcommercial natural hydrogen reservoirs, where H 2 has accumulated over geological timescales, can serve as precertified storage sites. This proposition is evaluated using the Bulqizë fault-controlled natural H 2 reservoir

EnvironmentOctober 6, 2026

Meteoritic organic matter records primitive oxygen reservoirs of the solar system.

Unraveling the complex formation and alteration history for extraterrestrial organic matter is key to understanding the chemical evolution of the solar system (SS) and potentially even life's emergence on Earth. In this study, we performed high-precision triple oxygen isotope measurements on insoluble organic matter (IOM) sourced from a diverse suite of carbonaceous chondrites (CCs). Remarkably, the IOM from primitive Type 1 and 2 CCs-including CI, CM, CR, Bells, and Tarda-have oxygen isotope co

EnvironmentOctober 6, 2026

Compound drought-heat wave hazards are concentrated in US regions with multiple social vulnerabilities and agricultural dependence.

Compound drought and heat wave (CDHW) events are becoming more frequent and intense across the contiguous United States, increasing risks to human health, ecosystems, agriculture, and energy production systems. However, their distribution across socioeconomically vulnerable communities remains largely unexplored at the national scale. In this study, we develop a CDHW metric by integrating weekly US Drought Monitor classifications with daily temperature extremes from 2000-2021, allowing consisten

EnvironmentOctober 6, 2026

An RNA thermogenic therapy to preserve lean mass and enhance metabolic health during GLP-1 weight loss.

Current obesity therapies reduce weight but often fail to preserve lean mass or sustain metabolic benefit. Glucagon-like peptide-1 receptor agonists (GLP-1RA) improve obesity-associated metabolic disease, but weight loss is often accompanied by reduced energy expenditure, loss of lean mass, and rapid fat-predominant regain after treatment discontinuation. We hypothesized that pharmacologic activation of adipose thermogenesis could specifically target fat loss, complement appetite suppression by