South Dakota Uranium Mining Controversy and Heart Cancer Resilience: Science Podcast Highlights (April 23, 2026)

Overview

The Science Podcast for April 23, 2026 features freelance science writer Quentin Septer discussing concerns about a proposed in situ uranium mine in Dewey Burdock, South Dakota, the science of cleanup, and the regulatory and legal challenges surrounding the project. The episode also includes a segment with Giulio Cucci, a researcher studying how the mechanical load in heart tissue could influence cancer growth and metastasis.

Key insights

• Rising uranium demand is tied to nuclear energy and technological investments, but domestic production remains a small share of consumption.
• In situ recovery (ISR) mining relies on fluids to dissolve uranium in aquifers, raising concerns about containment and potential groundwater contamination when confining layers are compromised.
• Cleanup technologies exist but may be prohibitively expensive for large ISR fields; long-term remediation remains a subject of debate based on Wyoming and other site studies.
• New microbial and chromatin dynamics research suggests that mechanical loading in the heart may suppress cancer growth, pointing to novel pathways in cancer biology and potential translation to other tissues.

Uranium mining in the United States: demand, policy, and the Dewey Burdock project

The podcast opens with Quentin Septer, a freelance science writer, explaining the context around uranium mining in the U.S. Demand for uranium is projected to double by 2040 due to interest in nuclear energy as a low-carbon power source, with several countries showing intent to expand atomic energy. Domestic production remains a small fraction of consumption, and policy actions—such as executive orders to facilitate new mines and the inclusion of uranium on a list of critical minerals—shape the regulatory landscape.

Septer describes the Dewey Burdock project in South Dakota as an in situ recovery (ISR) uranium mine. ISR works by injecting oxygen-rich fluids into an aquifer to dissolve uranium, which is then pumped to the surface, processed into yellow cake, and enriched for fuel or weapons use. Local concerns focus on cultural ties to Native American lands and the geological features that challenge containment. In particular, the Dewey Burdock site includes thousands of boreholes from past exploration efforts that may breach confining layers, threatening containment and potentially allowing mining fluids to migrate to other aquifers or surface waters. The local geology, with faults and breccia pipes, further complicates containment concepts, and Hanan Legari of Ogallala Lakota College argues that containability at Dewey Burdock is, indeed, compromised.

3 quotes below capture the core science and regulatory uncertainties of the Dewey Burdock case, illustrating the complex decision space for reporters and policymakers alike.

“There is just a question of containability, and the ideal ISR site has what experts call containability.” - Hanan Legari

“Just all pretense of containability is gone.” - Hanan Legari

Cleanup science and regulatory uncertainties

The discussion shifts to remediation after ISR mining ceases. The EPA radionuclides rule of 2000 identified technologies such as ion exchange, reverse osmosis, chemical precipitation, groundwater sweeping, reductive recirculation, and pump-and-treat methods to remove uranium from water. While these technologies can remove substantial fractions of uranium, applying them to a large 12,000-acre ISR field is expensive and often impractical. The Smith Ranch Highland site in Wyoming, exhausted in 1991, has provided a critical long-term data point: even after seven years of restoration, uranium concentrations in groundwater remained far above baseline levels, raising questions about the enduring efficacy of restoration strategies.

Today Dewey Burdock faces legal and regulatory uncertainty. The mine’s history includes proposals dating back to 2009, a sequence of lawsuits and petitions from environmental groups, a fast-tracked process under the Trump administration, and EPA and NRC actions that are being contested in courts. State-level permit decisions and NRC license renewals remain unresolved as local ballot measures and tribal concerns intersect with state and federal law. The interview highlights how scientific uncertainty about cleanup effectiveness, siting, and potential groundwater pathways translates into political and legal challenges for projects like Dewey Burdock.

Quentin Septer notes that the science of uranium existence and mobility has evolved: bacteria can immobilize uranium over millions of years in natural settings, a process that could affect both ISR mining approaches and post-mining restoration. A 2017 Nature Communications study found that most uranium in unmined roll-front deposits can be non-crystalline and biologically mediated, potentially changing how mining fluids interact with the environment and how future restoration should be approached.

4 quotes to reflect the key points of this section follow:

“The regeneration of an ISR well field across 12,000 acres, with restoration techniques, is expensive and often impractical.” - Quentin Septer

“Groundwater uranium concentrations remained about 70 times above baseline after seven years of restoration at Smith Ranch Highland.” - Quentin Septer

Microbes, minerals, and the future of ISR

Cucci’s segment on the heart and cancer shifts the focus from mining to biology. Cucci describes how researchers are investigating why heart tissue shows remarkably low rates of cancer and metastasis. One hypothesis centers on the heart’s mechanical load, the constant contraction that shapes cardiomyocytes and their microenvironment. The challenge is to separate mechanical forces from the cells’ biological programs while keeping heart tissue viable. In vivo experiments in mice used a transplanted heart to create a system with one heart bearing normal mechanical load and another left unloaded yet still perfused, revealing that cancer can invade and proliferate in the unloaded heart. In vitro, engineered cardiac-tissue strips subjected to controlled mechanical forces demonstrated that removing mechanical load enabled cancer cells to invade more readily.

Cucci and colleagues used transcriptomics to compare cardiac metastases with those in other organs. They observed alterations in histone methylation dynamics, including changes suggesting that mechanical loading influences chromatin organization and gene expression. They investigated components of the nuclear envelope and connections to the cytoskeleton, finding that a link protein (NestPRINT2 in the narrative) interacts with actin and the nucleus; removing this link reduces the cells’ sensitivity to mechanical load, allowing cancer cells to grow more freely. The researchers propose that continuous rhythmic loading in the heart creates a unique, protective mechanical environment that is not easily emulated by other mechanically active tissues like skeletal muscle or lung tissue, which may explain why heart cancer is rare and metastases to the heart are unusual.

The podcast discusses translational possibilities, including wearable devices designed to apply localized compression to superficial tumors such as melanoma. Cucci notes that while the heart's mechanism is intriguing, translating this to other organ systems will require deeper understanding of tissue-specific mechanics and chromatin regulation. The discussion also touches on how mechanical forces may be transduced to the nucleus through the LINC complex, potentially guiding chromatin remodeling and cell proliferation in cancer. The section closes with Cucci’s outlook on pursuing further exploration of microbe-guided restoration strategies in other contexts and the broader implications for cancer biology.

4 quotes to reflect the heart-cancer segment follow:

"The cancer is able to really invade all the tissue and grow without any limit.” - Giulio Cucci

"The continuous compression that you have in the heart and you don't have in the muscle is key.” - Giulio Cucci

"The mechanical forces can be transduced through the cells to changes in chromatin and gene expression.” - Giulio Cucci

Translation, collaboration, and final reflections

The episode concludes with Cucci describing ongoing collaborations around wearable devices to locally compress superficial tumors and a broader effort to map how mechanical cues influence chromatin dynamics across tissues. The hosts and guests emphasize the importance of reporting science with uncertainty, given the lack of a guaranteed path for Dewey Burdock or similar projects to proceed, and they underscore the potential for interdisciplinary research at the intersection of physics, biology, and engineering to illuminate new therapeutic or environmental strategies.

Giulio Tucci is identified as a postdoctoral researcher at the International Center for Genetic Engineering and Biotechnology in Trieste; a link to the paper discussed is provided on science.org/podcast.

This episode also notes adjacent Science coverage and concludes with the standard credits for production and editorial staff.