UNESCO

Chair on Heritage Futures

Gamma Fields: The Industrial Legacy We Cannot Afford to Forget

2025-04-28

By Claudio Pescatore

What if the true monuments of the nuclear age are not vaults, vitrified blocks, or warning markers—but fields of invisible light?

  • Gamma radiation is insidious. It leaves no ruin, no ash, no wound you can see. You don’t need to touch it. You don’t need to breathe it in. You simply pass by—and it passes into you. No trace is left on the soil. But a trace is left in you. And when the next person passes, they too receive the signal. Yet the source remains—unchanged, unweakened.
  • Most poisons are spent as they harm. Gamma radiation is not. It accumulates elsewhere, silently, without diminishing its source. A kind of ambient inheritance.

In a recent study, I calculated the gamma radiation field unleashed by humanity’s Uranium-238 (U-238) legacy. The results show that this field is not temporary. It is already present, slow to mature, but geologically assured and radiologically significant, beyond safety thresholds.

  • Mill tailings scattered across continents emit gamma radiation through uranium’s progeny. This signal will slowly fade over the next half a million years—but it will reach a baseline, unsafe value and will continue indefinitely.
  • Meanwhile, depleted uranium stockpiles—which emit almost no gamma today—are quietly maturing. From a few thousand years onward, their gamma output will rise steadily, eventually overtaking significantly that of tailings, peaking in two million years, and continuing unabated into geological time.
  • Most U-238 residues lie close to the surface—mill tailings, depleted uranium (DU) stockpiles, weapons testing sites, contaminated soils from mining and from exploded DU munitions. Even when their radiation does not cause immediate harm, it defines a long-term environmental signal whose meaning we have barely begun to grasp.

This raises questions not only of science, but of ethics, inheritance, and imagination:

  • What does it mean to leave behind a hazard that grows in potency over time?
  • How do we warn future beings of a danger concealed in ordinary soil or dust?
  • Should gamma radiation be seen not only as threat, but also as a marker of human agency?

Nuclear waste lasts a long time. But U-238 isn’t just persistent—it performs. It changes. It regenerates. It returns. And surprisingly, we don’t call it waste. We call it an industrial by-product.

And now we are not just leaving behind a signal—we are leaving a body.

  • About 4.5 million tonnes of U-238, mostly in oxide form, now reside in uranium tailings, DU, and spent fuel. It is a real, physical legacy—not symbolic, not speculative. This body must be put away—not forgotten, but deliberately placed and traced. Shielded, marked, and remembered.
  • We can still act. We can treat uranium’s gamma legacy not as an afterthought, but as a defining part of our industrial inheritance. This won’t undo the past—but it may shape how future generations understand what we’ve left them.

We often speak of the nuclear age as bracketed—confined by Cold War dates or the operational lifespan of reactors. But its material consequences are just beginning. Care begins by acknowledging and tending to what endures.

Claudio Pescatore
Claudio Pescatore is a member of the UNESCO Chair on Heritage Futures at Linnaeus University

Read more: http://www.nukleonika.pl/www/back/full/vol70_2025/v70n2p031f.pdf 

New article on urban transformation, heritage and social sustainability

2025-04-03

Bebyggelsehistorisk Tidskrift (Nordic Journal of Settlement History and Built Heritage): Urban transformation, heritage processes and social sustainable futures by Ulrika Söderström & Anders Högberg.

Short summary:

In this study, we use three case studies to discuss heritage processes as future-building practices. Through examples from urban regeneration processes in three Swedish cities, we discuss how these processes have contributed to social sustainability. The case studies are the Caroli neighbourhood in Malmö (transformed 1967-1973), the Valnötsträdet neighbourhood in Kalmar (transformed 2008-2018) and the ongoing transformation of Kiruna city. Our findings show that the cultural heritage processes activated in urban regeneration processes do not always promote socially sustainable future-making practices. We conclude that an engagement in different forms of future-making is crucial for heritage processes to contribute to long-term sustainable urban development. We suggest that this requires a way of thinking and acting that includes change and transformation. Our findings are conceptualised in a model that we hope can be used to understand heritage processes as future-making practices in urban transformation projects.

Bebyggelsehistorisk Tidskrift is a Nordic forum for research and debate on the history of the built environment. It is the Nordic region’s leading academic journal on the history of the built environment. The periodical presents the latest research on the history of the built environment, and also provides a forum for discussing the discipline in practice when buildings and heritage environments are being conserved.

https://bebyggelsehistoria.org/en/bebyggelsehistorisk-tidskrift-english/

Open access (Doctoral Thesis by Ulrika Söderström) https://lnu.diva-portal.org/smash/record.jsf?pid=diva2:1901953

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POSTSCRIPT 13 April 2025. Here is a graphical summary of the paper prepared by ChatGPT:

Conference by the Swedish National Heritage Board

2025-03-24

Anders Högberg held a keynote lecture at the conference “Kulturarvsforskning i Sverige 2025” – Cultural Heritage Research in Sweden 2025, organised by the Swedish National Heritage Board 20-21 March 2025 in Stockholm. Keynote paper: ‘Cultural heritage research 2025 – some thoughts on where we stand and questions for the future’.

Ulrika Söderström also presented her dissertation at the conference: “Cultural heritage as a resource in socially sustainable urban development: A designed living environment for the future”.

More about the dissertation here

Kulturarvsforskning i Sverige 2025 -Riksantikvarieämbetet (The Conference Programme in Swedish)

Anders Högberg
Anders Högberg, Professor of Archaeology UNESCO Chair on Heritage Futures
Ulrika Söderström
Ulrika Söderström, Doctor of Archaeology UNESCO Chair on Heritage Futures

Future Day at Linnaeus University

2024-12-12

On December 3, 2024, the university management invited to a theme day in Växjö about Linnaeus University and the future. A recording of the event is available here https://play.lnu.se/media/t/0_tb0d3lc4

Cornelius Holtorf participated live in a panel discussion with Marie Hedberg, Pro Dean at the Faculty of Social Sciences and Jörgen Forss, Vice Dean at the Faculty of Technology. Marcelo Milrad from the Faculty of Technology joined via link. The panel was chaired by Kerstin Årmann from the Office of External Relations.

Future Day at Linnaeus University 3 December 2024
Cornelius Holtorf in a panel discussion at the Future Day, Linnaeus University.

Workshop in Gothenburg

Anders Högberg and Gustav Wollentz from the UNESCO Chair on Heritage Futures were on the 22 November 2024 invited to conduct a workshop on future awareness for the management group at the Department for Nature and Cultural Heritage in the Region Västra Götaland. During the day we met 12 persons, and the workshop lasted for four hours. It took place at the Museum of Natural History in Gothenburg.

The main question we explored was: What will the museums’ societal role/mission look like in 2050? This question was approached through a series of sub-questions, for example with the aim of identifying societal challenges and how these can be proactively met through actions today.

The workshop was based on dialogue and the exchange of different perspectives and experiences. By such an approach, participants took on a more open approach to different types of futures in relation to the museums’ societal role and mission. In the exchange after the workshop, it was highlighted as particularly important to be able to approach the future as open where several different alternatives are conceivable. Participants expressed it as liberating not to see the future solely as an extension of the present, and to be able to seriously engage in considering alternatives for the future.

Museum of Natural History in Gothenburg
Museum of Natural History in Gothenburg. Photo Gustav Wollentz

History and Archaeology meet the Future

2024-11-11

On 11 November 2024, Cornelius Holtorf and David Staley ran a digital research seminar bringing together a unique gathering of historians and archaeologists from Ohio State University and Linnaeus University, working on the future. The title was “When history and archaeology meet the future” and the seminar was attended by 18 students and researchers from different disciplines and in different time zones.

Watch the full seminar here: https://play.lnu.se/media/t/0_us3m9ftw and here https://youtu.be/egs9t_QqgKM

Speakers included

  • Professor David Staley, Ohio State University
  • Professor Cornelius Holtorf, Linnaeus University
  • Professor Anders Högberg, Linnaeus University
  • Professor Noah Sobe, Loyola University Chicago
  • Dr Gustav Wollentz, Linnaeus University
  • Professor Christopher Nichols, Ohio State University

Among the participants and contributors to the half-day seminar were most members of the UNESCO Chair on Heritage Futures, including Sarah May, Emily Hanscam, Ulrika Söderström, Leila Papoli-Yazdi, and Helena Rydén.

Living Environments for the Future

2024-10-22

Today, Ulrika Söderström, defended her PhD thesis entitled “Cultural Heritage as a Resource in Socially Sustainable Urban Development: A Designed Living Environment for the Future” (Swedish with an extensive English summary), in front of an audience of 40 in the room and another 20 online.

Opponent: Professor Bodil Axelsson, Linköpings universitet

Examination Committee: Dr Anne S Beck, Museum Sydøstdanmark, Professor Mats Burström, Stockholms universitet, Docent Richard Pettersson, Umeå universitet

Supervisor: Professor Anders Högberg; Linnéuniversitetet

Chair/internal examiner: Professor Cornelius Holtorf, Linnéuniversitetet

ABSTRACT:

Claiming that cultural heritage must be preserved for sustainable urban development and for the benefit of future generations is common practice in cultural heritage management and urban planning. But when cultural heritage is used as a resource in urban transformation processes, do current heritage practices, including archaeology, promote the socially sustainable urban futures they aim to achieve?

This research aims to generate new knowledge on how Swedish contract archaeology can contribute to sustainable urban development and good living environments in an informed and innovative manner. By adopting a broad perspective, I explore how cultural heritage is utilized as a resource in urban transformation and design processes to promote social sustainability. Employing an interdisciplinary theoretical framework, I examine how the social sustainability effects of current heritage practices, including archaeology, affect sustainable futures making. The research includes three case studies on urban transformation: the Caroli quarter in Malmö (1967–1973), the Valnötsträdet quarter in Kalmar (2008–2018), and the ongoing transformation of Kiruna town.

The results highlight how contradictions between legislation’s focus on the past and cultural and urban planning’s future-oriented goals institutionalize ideas about cultural heritage value and the perception that preservation is a sustainable heritage practice in itself. Consequently, archaeology is rarely seen as a process or practice that promotes social sustainability. Instead, focus is on the value of the built historic environment and stories about the past, assuming that using these elements in development and design processes will promote present and future sustainability values, such as attractiveness, security, social cohesion, and collective identities. However, the results show that expected social sustainability goals are rarely met due to a lack of citizen participation and a lack of understanding of what is required to achieve these goals in the present and for the imagined futures. I argue that to effect change, it is necessary to explore futures literacy in theory and practice, deepen comprehension of how archaeology and heritage practices contribute to social value, and broaden participation in discussions and decisions regarding how cultural heritage can be used as a resource in urban development processes.

From left: Members of the UNESCO Chair on Heritage Futures, Helena Rydén, Cornelius Holtorf, Ulrika Söderström, Anders Högberg and Gustav Wollentz.

Various activities July – September 2024

2024-10-04

Cornelius Holtorf visited the activities with young people during Kalmar Town Festival, organized by Kalmar municipality’s cultural section under the label “Expedition Future” and inspired by our work in the UNESCO Chair on Heritage Futures (10 August 2024).

Cornelius Holtorf and Anders Högberg ran a Mini Futures Workshop for 30+ colleagues during the Kick-off meeting of the Department of Cultural Sciences at Linnaeus University, Sweden (20 August 2024).

Cornelius Holtorf sent comments and suggestions to the revised draft guidance note on ‘Climate action for living heritage’ to the UNESCO Living Heritage entitity (20 August 2024).

Cornelius Holtorf, Anders Högberg and Gustav Wollentz met with Alison Heritage and José Luiz Pedersoli at The International Centre for the Study of the Preservation and Restoration of Cultural Property (ICCROM) in Rome to discuss mutual interests and future collaboration in the area of promoting futures-thinking and futures literacy in the global heritage sector (30 August 2024)

Cornelius Holtorf presented a talk on “Is Archaeology Ready to Address the Climate Heritage Paradox?” for an audience of 25+ attending the session on “Archaeologies of Climate Change? Current Issues and Future Directions” held at the 30th Annual Meeting of the European Association of Archaeologists in Rome, Italy (31 August 2024)

Cornelius Holtorf attended an online symposium on “Nuclear Futures. Art, Speculation, Matter, Performance” arranged by Linköping University (11 September 2024).

Cornelius Holtorf took part in meetings of the Pledge Network, promoting strong references to future generations and their interests in the UN Summit of the Futures in September 2024 in New York and its aftermath (12 September 2024).

Cornelius Holtorf attended the report launch of the project “The Nuclear Spaces: Communities, Materialities and Locations (NuSPACES)” featuring speakers Sam Alberti (National Museums Scotland) and Elizabeth Norton (NDA) addressing questions of nuclear cultural heritage, held at the Science Museum, London, and online (18 September 2024).

Cornelius Holtorf participated in a side-event to the UN Summit of the Future organised by the Culture 2030 Goal Campaign and entitled “No Future Without Culture: Reflecting and Imagining on the Place of Culture in Delivering the Past for the Future” (20 September 2024).

Cornelius Holtorf followed online selected parts of the Action Days preceding the UN Summit of the Future, featuring, among others António Guterres, General-Secretary of the United Nations, Gabriella Ramos, the UNESCO Assistant Director-General for the Social and Human Sciences, Mamphela Ramphela, the former Co-Director of the Club of Rome, and Kim Stanley Robinson, the author of The Ministry for the Future (20-21 September 2024).

Cornelius Holtorf had an informal meeting in Cordoba, Spain, with Matthias Ripp, World Heritage Coordinator of Regensburg (Germany) and OWHC Regional Division Representative, discussing future collaborations (24 September).

Cornelius Holtorf contributed to a meeting of cirka 30 international experts and UNESCO staff finalising a guidance note on Safeguarding intangible cultural and climate change. The expert meeting was chaired by Fumiko Ohinata, Secretary of the UNESCO 2003 Convention and held digitally on 25-26 September 2024.

Climate Heritage Breakthrough

2024-09-28

Congrats to the Climate Heritage Network has achieved a major breakthrough by securing a total of $ 1.5 million in private funding for a series of initiatives.

Most notably, the “Imagining Low Carbon, Just, Climate Resilient Futures through Culture and Heritage” Project” will address two complementary problems. While contemporary climate planning suffers from a pervasive failure to help people imagine plausible ways of living that are not wedded to the carbon economy and the systems that support it, cultural heritage practice is not sufficiently attentive to address the climate change crisis at a large enough scale. By increasing culture-based climate action, transforming climate policy via cultural heritage, and supporting a range of partner communities, funding from the Mellon Foundation will address both issues at once.

The new funding for this and a number of additional smaller projects, means that the Climate Heritage Network is not only able to scale-up its activities but also continues to extend its agenda towards finding new roles for cultural heritage in the context of the climate change crisis. It is a good example why cultural futures can make us hopeful!

The UNESCO Chair on Heritage Futures is a sustaining member of the Climate Heritage Network.