An inspiring call to action that links today's climate crisis to Earth's evolution throughout history. Our Time is a true story. Alasdair Skelton takes readers through time, from the formation of the Earth to the present day, reflecting on the finely tuned climate system and its elegant workings that have made it possible for living things to thrive on Earth for three-and-a-half billion years. Skelton explores what happened when Earth's climate spiraled out of control and how it repaired itself time and time again, and as we plunge into our own chapter of time, he highlights our separation from nature as a root cause of the crisis in which we now find ourselves. Skelton tells this story as a geologist who was awoken to climate activism by the voices of his own students. He shares a perspective on the climate crisis as a blink of an eye amidst the enormity of time. Concluding with what will happen if we fail to act, and what will happen if we do act, Skelton compares alternative futures and explains how we can still choose a good one. Throughout, and without ever betraying scientific truth, Our Time navigates the narrow path from the inaction of denial and despair to the action of hope. This is a beautiful history of planet Earth and the role humans can play in its evolving climate story.

The challenge of halting climate change is often described as an environmental problem, although accumulating evidence states that climate change is largely driven by human behavior. Even though psychological research is highly useful for understanding human behaviors and what motivates them, this knowledge has not yet been widely applied in policies aiming to mitigate global warming. Policy implementations should anticipate impacts on both individual welfare and reductions in greenhouse gases. In this study, we aimed to explore which type and level of behavior change would have the optimal relationship with reductions in CO2e emissions and impact on quality of life (QOL). A survey was conducted among 500 participants living in the Stockholm Region, assessing how different behavior changes would affect their QOL. The carbon footprint was calculated through per capita estimates provided by Statistics Sweden. The most effective behavior changes according to this study were reductions in shopping, followed by work travel within Stockholm, private travel abroad and meat consumption. This indicates that these categories of behaviors are potential leverage points, where policy makers could implement meaningful and effective interventions while at the same time preserving individuals' QOL.

The aim of this study is to investigate the utility of speculative, fictional utopian narratives to be used as a comparative and critical tool to expose taken for granted ideas, discourses and norms in the five shared socioeconomic pathways (SSP1–5) that are used by the IPCC to build future scenarios. To achieve this goal, we first invited citizens to write stories about fictional utopian futures, which they perceived as good for “both people and the planet”. We then compared these utopian stories with the SSPs by (1) a semi-quantitative thematic analysis, and (2) a critical literary analysis. Based on the thematic analysis, we found strong similarities between the utopian futures and SSP1 (“Taking the Green Road”) at a superficial level. Based on the literary analysis, we found that this apparent similarity obscured fundamental differences between the implicit mindsets that was found in SSP1 and the utopian futures; with the former underpinned by collective anthropocentrism and the latter by collective ecocentrism. We conclude that speculative utopias, that are not bound by the requirement of perceived plausibility, can provide a powerful tool to scrutinize and extend science-based future scenarios, such as the SSPs, to consider other aspects, such as different mindsets and norm-breaking solutions.

Faults within layered basaltic sequences significantly influence hydrothermal fluid flow in shallow geothermal reservoirs and potentially during CO2 sequestration and storage. Nevertheless, their characterization regarding fault zone architecture, fluid flow, deformation mechanisms, and seismic potential remains underdeveloped. This study addresses this gap by integrating structural and microstructural observations with X-ray diffraction analyses of exposed normal-transtensional faults associated with the seismically active Húsavík-Flatey Fault in the Tjörnes Fracture Zone, Northern Iceland. Our findings demonstrate that the evolution of basalt-hosted normal-transtensional faults progresses through distinct stages: (1) low-displacement fault propagation from pre-existing cooling joints; (2) fault linkage via dilational jogs; (3) damage zone/fault core growth through brecciation and cataclastic processes; (4) shear localization along sharp slip surfaces; and (5) smearing of volcaniclastic interbeds along the principal fault plane. Evidence of shear localization, truncated clasts, and hydrothermal breccias/veins suggests repeated seismic slip events facilitated by overpressured fluids. Conversely, the presence of clay-rich foliated cataclasite indicates aseismic slips during interseismic periods. Slip along fault jogs, bends, geometric irregularities, and orientation changes causes the dilatant opening of the fault planes and extensional horsetail fractures at fault tips. These structures create main tabular zones for lateral movement of hydrothermal fluids parallel to the fault strike in shallow geothermal reservoirs situated in active extensional-transtensional tectonic settings. In addition, the dilational jogs and the intersection of horsetail veins with the hosting faults may define linear zones of high structural permeability and intense localized fluid flow parallel to the σ2 paleostress orientation and finally mineral precipitation. The results of this study can be utilized to improve models of geothermal fluid flow for enhanced recovery in basaltic reservoirs and assess seismic risk in basaltic faults.

Naxos in the Greek Cyclades preserves a type example of polymetamorphism. The southern and northern parts of the island record different Tertiary P–T histories between Eocene and Miocene times, including a blueschist facies event, one or more amphibolite/greenschist facies overprint(s) and contact metamorphism. Age attributions for these events are inconsistent in the literature. Here, we propose a new approach that combines electron probe microanalyzer (EPMA) characterization of the white mica (WM) with 39Ar-40Ar–Rb-Sr multichronometry. Textural–petrographic–compositional observations reveal that the polygenetic WM consists of five different generations: pre-Eocene relicts, paragonite, high-Si phengite, low-Si phengite and muscovite. EPMA mapping of four WM samples, previously analysed by Rb-Sr, reveals major element compositions heterogeneous down to the μm scale. Each WM consists of chemically distinct generations, documenting submicron-scale retrogression of high-pressure (HP) phengite grains to muscovite. Four WM samples from a N-S traverse across the island were analysed by 39Ar-40Ar stepheating, comparing coarse and fine sieve size fractions to obtain overdetermined K-Ar systematics. Fine sieve fractions are richer in Cl than coarse ones. Linear arrays in Cl/K-age isotope correlation diagrams show two predominant WM generations (one Cl-poor at ca. 38 Ma and one Cl-rich at <20 Ma). A lower-grade sample from southern Naxos was less pervasively recrystallized, provides older ages and preserves at least three WM generations, including a relict WM with a pre-Palaeocene K-Ar age, consistent with the high Ar retentivity of WM in the absence of complete recrystallization. The age of the Cl-poor end-member WM approximates the age of the HP event, 38 Ma. Ar inheritance in Cretaceous mica relicts is heterogeneous at the single-grain scale. Comparing the degassing rates of the WM fractions rules out ‘multidomain’ diffusion. As no sample is monomineralic, the degassing rate of each polygenetic mica is instead controlled by the mass balanced sum of the unrelated rate constants of its constituent minerals. Given the commonness of zoned and composite micas, the approach detailed here is potentially useful for reconstructing polyphase metamorphic histories worldwide.