Show Notes: What the Bog Remembers

October 2, 2026

What the Bog Remembers

Sources and further reading

Peat, preservation & environmental archives

U.S. Environmental Protection Agency. “Classification and Types of Wetlands.”
The distinction between rain-fed bogs and fens receiving water and nutrients from surrounding soils. It helps keep the episode’s different wetland examples from being treated as chemically identical.
Read through the EPA

Lynnerup, Niels. “Bog Bodies.” The Anatomical Record (2015).
An overview of bog-body preservation and analysis, including the uneven survival of skin, bone, hair, and other materials.
Read through Wiley

Painter, Terence J. “Lindow Man, Tollund Man and Other Peat-Bog Bodies: The Preservative and Antimicrobial Action of Sphagnan, a Reactive Glycuronoglycan with Tanning and Sequestering Properties.” Carbohydrate Polymers (1991).
One proposed chemical contribution of Sphagnum to tissue preservation. The episode does not attribute every instance of preservation to this single compound.
Read the article

Historic England. “How Does Wood Survive Underground for Thousands of Years?”
Explains why waterlogged wood can appear intact yet be damaged by uncontrolled drying after excavation.
Read through Historic England

Rydin, Håkan, and John K. Jeglum. “The Peat Archives.” In The Biology of Peatlands (2006).
A broad introduction to peat as a record of vegetation, pollen, charcoal, atmospheric pollution, and environmental change.
Read the chapter description

Gehrels, Maria J., and colleagues. “Towards Rapid Assay of Cryptotephra in Peat Cores: Review and Evaluation of Various Methods.” (2008).
Background for the tiny volcanic particles that can remain hidden in a peat core and help relate layers across sites.
Read the research record

Rawlence, Nicolas J., and colleagues. “Using Palaeoenvironmental DNA to Reconstruct Past Environments: Progress and Prospects.” Journal of Quaternary Science (2014).
Useful context for what environmental DNA can add to ancient environmental records and the limits of that evidence.
Read the review

Bog bodies, offerings & lives around wetlands

Museum Silkeborg. “The Discovery of Tollund Man.”
The account behind the 1950 discovery, including Grethe Højgaard’s hand finding the space between his cap and forehead. The episode’s cold open imaginatively reconstructs the scene around documented details.
Read the museum account

Helt Nielsen, Nina, and colleagues. “Diet and Radiocarbon Dating of Tollund Man: New Analyses of an Iron Age Bog Body from Denmark.” Radiocarbon (2018).
The newer dating and dietary research on Tollund Man.
Read through Cambridge Core

Helt Nielsen, Nina, and colleagues. “The Last Meal of Tollund Man: New Analyses of His Gut Content.” Antiquity 95 (2021): 1195–1212.
The detailed re-examination of plant remains and other traces in his digestive contents, including evidence relevant to parasites.
Read through Cambridge Core

Museum Silkeborg. “The Latest News about Tollund Man.”
The history of choices about conserving, examining, and displaying his remains after excavation.
Read through Museum Silkeborg

Moesgaard Museum. “The Grauballe Man.”
The museum’s account of his discovery, injuries, and its interpretation of his death; the episode distinguishes the physical evidence from an interpretation of its purpose.
Read through Moesgaard

British Museum. Regarding the Dead: Human Remains in the British Museum (2015).
Includes a discussion of the competing interpretations of Lindow Man’s injuries and the “triple death” account, as well as questions surrounding human remains in museums.
Read the museum publication

Smyth, Jessica, and colleagues. “Four Millennia of Dairy Surplus and Deposition Revealed through Compound-Specific Stable Isotope Analysis and Radiocarbon Dating of Irish Bog Butters.” Scientific Reports 9 (2019): 4559.
The study of 32 Irish bog butters, including the Knockdrin date and the finding that 26 samples could confidently be identified as dairy fat.
Read the open-access paper

Holst, Mads Kähler, and colleagues. “Direct Evidence of a Large Northern European Roman Period Martial Event and Postbattle Corpse Manipulation.” PNAS 115 (2018).
The Alken Enge research on battle deaths and subsequent treatment and deposition of remains. The paper’s discussion of ritual possibilities concerns that later handling, rather than establishing that the men were killed as sacrifices.
Read the open-access paper

University of Cambridge, Department of Archaeology. “Major New Publication of Two Volumes Reveals ‘Cosy Domesticity’ of Bronze Age Must Farm Settlement.” 2024.
The four roundhouses, square entrance structure, fire, and unusually rich evidence of household life at Must Farm.
Read the project account

Historic England. “A Bronze Age Post Alignment and Timber Platform at Flag Fen.”
Describes the timber structures and wider archaeological landscape. For the coexistence of causeway construction and votive deposits, see also Historic England’s guidance on later prehistoric ritual structures.
Read the monument record · Read the ritual-structures guidance

Historic England. “The Sweet Track and Climate Change.”
The Neolithic wooden walkway across the Somerset Levels and the preservation challenges posed by changing water levels.
Read through Historic England

Marsh lights, folklore & a possible physical mechanism

Sikes, Wirt. British Goblins: Welsh Folk-Lore, Fairy Mythology, Legends and Traditions. 1880.
The primary collected text for the Morris Griffith corpse-candle account, including the funeral procession delayed by water crossing its route. It is a nineteenth-century retelling, not direct evidence of an event’s supernatural cause.
Read the public-domain text

Xia, Y., and colleagues. “Unveiling Ignis Fatuus: Microlightning between Microbubbles.” PNAS 122 (2025).
Laboratory experiments showing light-producing electrical discharges between methane-containing bubbles. The mechanism does not identify the cause of any particular historical marsh-light report. The paper also notes that older phosphine explanations remain speculative.
Read the open-access paper

Memory, trauma & the limits of an explanation

American Psychological Association. “Questions and Answers about Memories of Childhood Abuse.”
Context for uncertainty, suggestion, and the need to avoid both manufacturing a history for someone and dismissing a person’s account because memory can be imperfect.
Read through the APA

Herman, Judith L. “Recovery from Psychological Trauma.” Psychiatry and Clinical Neurosciences 52 (1998).
The clinical source for placing safety first in trauma recovery, before work that involves recounting and mourning an experience. It supports the discussion of timing and support without suggesting that trauma-focused treatment is never useful.
Read the article

U.S. Department of Veterans Affairs, National Center for PTSD. “Present-Centered Therapy for PTSD.”
An example of a therapy focused on current difficulties that does not require a person to recount the traumatic event. The VA also describes trauma-focused therapies as important evidence-based options.
Read the treatment description

Substance Abuse and Mental Health Services Administration. “Trauma-Informed Approaches and Programs.”
Background for safety, voice, choice, and avoiding renewed harm in services for people with trauma histories.
Read through SAMHSA

Divination, interpretation & consent

The Metropolitan Museum of Art. “Cuneiform Tablet: Fragment of a Liver Omen.”
The specific Mesopotamian tablet whose interpretation of liver features concerns an army’s success in battle.
See the object and museum notes

Smithsonian National Museum of Asian Art. “Making Sense of the Future: The Oracle Bone and Shang Dynasty Divination.”
The material, questions, crack interpretation, and sometimes recorded outcomes of Shang royal divination.
Read the museum lesson

UNESCO Intangible Cultural Heritage. “Ifá Divination System.”
An introduction to the living Yoruba practice, its signs, literary corpus, trained practitioners, and communities. It is included for context, not as a source of instructions for another tradition’s practice.
Read the UNESCO entry

The Metropolitan Museum of Art. “Before Fortune-Telling: The History and Structure of Tarot Cards.”
The fifteenth-century card-game history of tarot, before its later occult and divinatory associations.
Read the museum essay

Gauchou, Hélène L., Ronald A. Rensink, and Sidney S. Fels. “Expression of Nonconscious Knowledge via Ideomotor Actions.” Consciousness and Cognition 21, no. 2 (2012): 976–982.
The Ouija-board study involving general-knowledge questions and responses participants regarded as guesses. Its results do not demonstrate access to hidden personal histories or future events.
Read the study record

Olson, Jay A., Ewalina Jeyanesan, and Amir Raz. “Ask the Pendulum: Personality Predictors of Ideomotor Performance.” Neuroscience of Consciousness (2017).
The pendulum study using rapid visual detection, with overall accuracy similar to verbal responses. It keeps the claim about ideomotor performance tied to the task actually tested.
Read the open-access paper

Human remains & respectful study

Ward, Alie, with Salima Ikram and Kara Cooney. “Momiology (Mummification), Part 2.” Ologies, October 18, 2024.
The conversation Nicole about the value of studying ancient remains, the separate choices involved in displaying them, respect for the dead, and the role of communities with cultural ties to those remains. The discussion concerns Egyptian mummies; the episode draws an ethical comparison without treating Egyptian and Danish contexts as identical.
Listen and find the transcript

Item added to your cart