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Ice Shelves: Antarctica’s Gatekeepers

Abstract not available

• Speaker: Becky Dell (Geography)
• Monday 10 March 2025, 13:00-14:00
• Venue: MR3, CMS.
• Series: Quantitative Climate and Environmental Science Seminars; organiser: Dr Kasia Warburton.

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After the Economic Research Service was moved to Kansas City in 2019, staffing and productivity took a dive

Human Judgement and Decision-Making Under Uncertainty

A weather forecast is only useful if appropriate decisions are made on the basis of the forecast. This presents a challenge, because weather forecasts are innately uncertain. How do we ensure that the likelihood of an event, particularly for extreme and impactful weather, is understood and acted upon? This is where psychology meets physics, and where the application of mathematical understanding is key.

• Speaker: Helen Roberts (Met Office)
• Monday 24 February 2025, 13:00-14:00
• Venue: MR3, CMS.
• Series: Quantitative Climate and Environmental Science Seminars; organiser: Bethan Wynne-Cattanach.

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Rewards are essential for motivation, decision-making, memory, and mental health. We identified the subventricular tegmental nucleus (SVTg) as a brainstem reward center. In mice, reward and its prediction activate the SVTg, and SVTg stimulation leads to ...

Single-cell decisions made in complex environments underlie many bacterial phenomena. Image-based transcriptomics approaches offer an avenue to study such behaviors, yet these approaches have been hindered by the massive density of bacterial messenger ...

Vertical migrations by marine organisms contribute to carbon export by consumption of surface phytoplankton followed by defecation in the deep ocean. However, biogeochemical models lack observational data, leading to oversimplified representation of ...

Vascular inflammation regulates endothelial pathophenotypes, particularly in pulmonary arterial hypertension (PAH). Dysregulated lysosomal activity and cholesterol metabolism activate pathogenic inflammation, but their relevance to PAH is unclear. ...

Rise and fall of Bronze Age Mediterranean societies: a new geoarchaeological and chronostratigraphic sequence of Nuragic Sardinia

Around the beginning of the Late Holocene (4,200 years BP) across the western Mediterranean regions, Bronze Age societies developed unique socio-economic and political complexity reflected in the construction of monumental stone architecture. New geoarchaeological and chronostratigraphic research in Sardinia, Italy, exposes for the first time the environmental underpinnings of the expansion and decline of the Nuragic Bronze Age monument-building society. These findings also highlight the role of prehistoric societies in shaping the landscape of the Mediterranean region over the Holocene. Multi-proxy geoarchaeological analyses—including soil micromorphology, XRD mineralogy, magnetic susceptibility, and geochemistry—reveal that the Bronze Age climax soil type of basaltic mesas in Sardinia was a dark Vertisol rich in primary nutrients and montmorillonite clay. These fertile soils sustained grassland ecosystems and played a key role in the distribution of early Middle Bronze Age Nuragic monuments across Sardinia’s basaltic landscapes. However, prolonged and intensified land use, particularly animal herding and agriculture, to support monument construction led to soil erosion and, ultimately, the replacement of deep, nutrient-rich Vertisol cover with a thin, oxidised and vertic Cambisol one. These processes resulted in a significant increase in sediment supply in the catchment east of the mesa, causing a new major phase of alluviation in the valley bottoms during the Late Holocene. These landscape changes triggered a socio-environmental crisis marked by the abandonment of the mesa at the end of the Middle Bronze Age, hence excluding the influence of a climate change in causing the local societal collapse.

• Speaker: Gian Battista Marras (British School at Rome)
• Wednesday 19 March 2025, 17:30-19:00
• Venue: Latimer Room, Clare College.
• Series: Quaternary Discussion Group (QDG); organiser: sr632.

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Rise and fall of Bronze Age Mediterranean societies: a new geoarchaeological and chronostratigraphic sequence of Nuragic Sardinia

Around the beginning of the Late Holocene (4,200 years BP) across the western Mediterranean regions, Bronze Age societies developed unique socio-economic and political complexity reflected in the construction of monumental stone architecture. New geoarchaeological and chronostratigraphic research in Sardinia, Italy, exposes for the first time the environmental underpinnings of the expansion and decline of the Nuragic Bronze Age monument-building society. These findings also highlight the role of prehistoric societies in shaping the landscape of the Mediterranean region over the Holocene. Multi-proxy geoarchaeological analyses—including soil micromorphology, XRD mineralogy, magnetic susceptibility, and geochemistry—reveal that the Bronze Age climax soil type of basaltic mesas in Sardinia was a dark Vertisol rich in primary nutrients and montmorillonite clay. These fertile soils sustained grassland ecosystems and played a key role in the distribution of early Middle Bronze Age Nuragic monuments across Sardinia’s basaltic landscapes. However, prolonged and intensified land use, particularly animal herding and agriculture, to support monument construction led to soil erosion and, ultimately, the replacement of deep, nutrient-rich Vertisol cover with a thin, oxidised and vertic Cambisol one. These processes resulted in a significant increase in sediment supply in the catchment east of the mesa, causing a new major phase of alluviation in the valley bottoms during the Late Holocene. These landscape changes triggered a socio-environmental crisis marked by the abandonment of the mesa at the end of the Middle Bronze Age, hence excluding the influence of a climate change in causing the local societal collapse.

• Speaker: Gian Battista Marras (British School at Rome)
• Wednesday 19 March 2025, 17:30-19:00
• Venue: Latimer Room, Clare College.
• Series: Quaternary Discussion Group (QDG); organiser: sr632.

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Green hydrogen production will must increase 300-fold to help forestall dangerous climate change

The latest in science and policy

Bits with Soul

When people think of codes, coding, and computers, they often think of socially challenged nerds like me, writing “code” (whatever that might be) in a darkened basement, all soulless ones and zeros and glowing screens. But in fact computer science (the study of information, computation, and communication) gives us an enormously rich new lens through which to look at and explore the world. By encoding everything in the same, digital bits, we can mechanise the analysis and transformation of that information; we can explore it in ways that are simply inaccessible to manual techniques; we can engage our creativity to write programs whose complexity rivals the most sophisticated artefacts that human beings have produced—and yet fit on a USB drive; we can even learn from data in ways that have made “ChatGPT” into a verb practically overnight.

Given how closely digital technology is interwoven in our lives, having a visceral sense of how this stuff works, what it can do well, and how it can fail, is essential for us to survive and thrive, and should be part of every child’s education.

In my talk I will share some of the joy, beauty, and creativity of computer science. This is serious, because it impinges on our daily lives. But it is also rich, beautiful, and fun.

• Speaker: Professor Simon Peyton Jones, University of Cambridge
• Friday 24 January 2025, 17:30-18:30
• Venue: Lady Mitchell Hall, Sidgwick Avenue.
• Series: Darwin College Lecture Series; organiser: Janet Gibson.

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Genomes contain mosaics of discordant evolutionary histories, challenging the accurate inference of the tree of life. Although genome-wide data are routinely used for discordance-aware phylogenomic analyses, because of modeling and scalability ...

Androgens are pleiotropic and play pivotal roles in the formation and variation of sexual phenotypes. We show that differences in circulating androgens between the three male mating morphs in ruff sandpipers are linked to 17-beta hydroxysteroid ...

Higher strength and higher ductility are desirable for structural materials. However, ultrastrong alloys inevitably show decreased strain-hardening capacity, limiting their uniform elongation. We present a supranano (<10 nanometers) and short-range ...

The mammalian Y chromosome is essential for male fertility, but which Y genes regulate spermatogenesis is unresolved. We addressed this by generating 13 Y-deletant mouse models. In Eif2s3y, Uty, and Zfy2 deletants, spermatogenesis was impaired. We found ...

The distribution of substitutional aluminum (Al) atoms in zeolites affects molecular adsorbate geometry, catalytic activity, and shape and size selectivity. Accurately determining Al positions has been challenging. We used synchrotron resonant soft x-ray ...

Emerging wearable devices would benefit from integrating ductile photovoltaic light-harvesting power sources. In this work, we report a small-molecule acceptor (SMA), also known as a non–fullerene acceptor (NFA), designed for stretchable organic solar ...

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