Within Radiation
Did the Sickness Start Too Soon?
The witnesses' early sickness reports matter because radiation, heat, stress, and toxins each imply different onset patterns.
On this page
- What the witnesses said happened first
- How acute radiation timing is usually judged
- Why timing alone cannot prove the cause
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Introduction
One of the most important medical questions in the Cash-Landrum case is not whether the witnesses became ill, but how quickly they became ill. Betty Cash, Vickie Landrum and Colby Landrum all reported nausea and vomiting beginning the same night as the encounter, with later accounts often describing symptoms appearing within hours. That timing matters because acute radiation syndrome (ARS) follows dose-dependent patterns. Radiation experts frequently use the interval between exposure and the onset of vomiting as a rough indicator of how much radiation was absorbed. The shorter the interval, the larger the dose is generally presumed to be. [CDC]cdc.gov• Onset occurs 1 hour to 2 days after exposure. • Stage lasts for minutes to days. • Stem cells in…Read more…
The result is a paradox at the centre of the Cash-Landrum debate. Early vomiting is not inconsistent with radiation exposure. However, if vomiting began as rapidly as some accounts suggest, the dose implied by standard radiation medicine could be so high that the witnesses would be expected to suffer far more severe consequences than were actually documented. That tension is one reason the timing evidence remains controversial. [CDC+2remm.hhs.gov]cdc.gov• Onset occurs 1 hour to 2 days after exposure. • Stage lasts for minutes to days. • Stem cells in…Read more…
What the Witnesses Said Happened First
Accounts of the incident generally agree on the broad sequence. After the reported encounter on the evening of 29 December 1980, Cash drove the Landrums home and then returned to her own house. The witnesses later reported that nausea, vomiting, diarrhoea, weakness, burning eyes and a sunburn-like sensation developed that night rather than days later. [Wikipedia]WikipediaCash–Landrum incidentCash–Landrum incident
The exact timing is harder to pin down. Retellings often compress events into phrases such as “within hours” or “almost immediately afterwards”. Some later summaries describe Cash becoming ill shortly after arriving home, while the others reported symptoms the same evening. What is notable is that the sickness was not described as emerging after a prolonged symptom-free interval. The witnesses consistently placed the first gastrointestinal symptoms very close to the alleged exposure event. [Wikipedia+2Spreaker]WikipediaCash–Landrum incidentCash–Landrum incident
This chronology became central to UFO investigators who argued that the illness resembled radiation sickness. In popular discussions of the case, the rapid appearance of nausea and vomiting was often presented as evidence supporting a radiation-related explanation rather than a conventional illness that happened to occur later. [HowStuffWorks]science.howstuffworks.comHow Stuff Works The Cash-Landrum UFO IncidentThe Cash-Landrum UFO IncidentJanuary 1, 1970 — Vickie Landrum (left) and Betty Cash fell victim to radiation sickness after…
How Acute Radiation Timing Is Usually Judged
Radiation medicine does not treat vomiting as a simple yes-or-no sign. Instead, clinicians pay close attention to when it begins.
The US Centers for Disease Control and Prevention notes that nausea and vomiting are among the earliest symptoms of acute radiation syndrome and can appear from roughly one hour to two days after a significant whole-body exposure. The timing helps physicians estimate dose severity. [CDC]cdc.gov• Onset occurs 1 hour to 2 days after exposure. • Stage lasts for minutes to days. • Stem cells in…Read more…
A well-established principle in radiobiology is that earlier vomiting generally indicates a larger absorbed dose. Medical references describe a relationship between radiation dose and the onset of emesis: as dose increases, the interval before vomiting decreases. [PMC]pmc.ncbi.nlm.nih.govPMCRadiobiology of the acute radiation syndromeNIHby MM i Garau · 2011 · Cited by 196 — The estimate dose threshold for vomiting at the prodromal phase is 1.5 Gy and the time of…
In practical terms:
- Vomiting that begins many hours after exposure can be compatible with lower-dose acute radiation injury.
- Vomiting that begins within an hour suggests a substantially higher dose.
- Vomiting within minutes is typically associated with extremely severe exposures. [remm.hhs.gov+2PMC]remm.hhs.govTime Phases of Acute Radiation Syndrome (ARS)VomitingOnset: <30 minutes after exposure; Percent of victims who vomit at this dose: 100%; Diarrhea. Heavy; Onset: 1-3 hours after exposure; Pe…
This is why radiation accident investigators routinely ask survivors when they first became nauseated. The answer is used as a rough biological dosimeter when physical measurements are unavailable. [Unbound Medicine]unboundmedicine.comTime between radiation and the development of prodromal symptoms of nausea/vomiting is essential for helping estimate total dose…Read…
Why the Reported Timing Creates a Dose Problem
The difficulty for a radiation explanation is not that the reported vomiting occurred too soon to fit ARS. The problem is that it may have occurred so soon that it implies an extraordinarily large dose.
Medical literature on acute radiation syndrome shows that severe gastrointestinal illness appearing very rapidly is associated with exposure levels that are often life-threatening. The gastrointestinal form of ARS generally emerges at doses above roughly 6 Gy, while doses around 10 Gy or more are typically fatal despite treatment. Extremely early vomiting is one of the warning signs used to identify such exposures. [Nature+2NUEM Blog]nature.comGastrointestinal acute radiation syndrome: current…by ML Freeman · 2025 · Cited by 13 — Patients with GI-ARS experience a prodro…
This issue has been raised repeatedly by critics of the radiation hypothesis. Discussions of the case by sceptical investigators note that if the witnesses truly experienced radiation-induced vomiting almost immediately after exposure, the corresponding dose estimate could be so high that survival for years afterwards would be difficult to reconcile with established radiation medicine. [Wikipedia]WikipediaCash–Landrum incidentCash–Landrum incident
The argument is not that radiation can never cause vomiting within hours. It certainly can. The argument is that the combination of very rapid symptoms, survival, and the absence of some expected catastrophic outcomes makes a straightforward high-dose radiation interpretation problematic. [CDC+2PMC]cdc.gov• Onset occurs 1 hour to 2 days after exposure. • Stage lasts for minutes to days. • Stem cells in…Read more…
Could Vomiting Have Had Other Causes?
Nausea and vomiting are among the least specific symptoms in medicine. They can be triggered by many conditions unrelated to ionising radiation.
In the context of the Cash-Landrum incident, alternative possibilities proposed by commentators have included:
- Exposure to intense heat.
- Chemical or aerosol contamination.
- Psychological stress and fear.
- Dehydration or exhaustion.
- An unrelated medical illness coincidentally beginning around the same time. [Wikipedia]WikipediaCash–Landrum incidentCash–Landrum incident
The challenge is that vomiting alone cannot distinguish between these possibilities. Radiation specialists therefore look for a broader pattern: blood-cell changes, dose reconstruction, documented skin injury consistent with radiation burns, and a progression of symptoms matching known ARS stages. Timing is useful evidence, but it is only one piece of the diagnostic puzzle. [CDC+2CDC]cdc.gov• Onset occurs 1 hour to 2 days after exposure. • Stage lasts for minutes to days. • Stem cells in…Read more…
Why Timing Alone Cannot Prove the Cause
The strongest conclusion that can be drawn from the early sickness reports is a limited one. If the witnesses accurately reported vomiting and nausea beginning the night of the encounter, the timing is compatible with some forms of acute radiation exposure. It does not automatically confirm that radiation was responsible. [CDC]cdc.gov• Onset occurs 1 hour to 2 days after exposure. • Stage lasts for minutes to days. • Stem cells in…Read more…
At the same time, the timing does not neatly support a high-dose radiation scenario either. Standard radiation medicine treats very early vomiting as a marker of substantial exposure, and substantial exposure should normally produce a wider set of predictable clinical consequences. The fact that the reported onset appears rapid while long-term survival remained relatively good is one reason the case continues to generate disagreement among investigators. [PMC+2Nature]pmc.ncbi.nlm.nih.govPMCRadiobiology of the acute radiation syndromeNIHby MM i Garau · 2011 · Cited by 196 — The estimate dose threshold for vomiting at the prodromal phase is 1.5 Gy and the time of…
For that reason, the early vomiting reports are best understood as evidence that raises questions rather than settles them. They are consistent with the witnesses having experienced a genuine physical event, but the timing by itself cannot determine whether the cause was ionising radiation, another environmental exposure, or something else entirely. [CDC+2Zenodo]cdc.gov• Onset occurs 1 hour to 2 days after exposure. • Stage lasts for minutes to days. • Stem cells in…Read more…
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Provides broader context for evaluating prominent UFO cases such as Cash-Landrum.
The Demon-Haunted World
Useful for understanding why symptom timing alone cannot conclusively establish causation.
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Emphasizes structured assessment of witness reports and claimed physical effects.
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Endnotes
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Source: cdc.gov
Link: https://www.cdc.gov/radiation-emergencies/hcp/clinical-guidance/ars.htmlSource snippet
• Onset occurs 1 hour to 2 days after exposure. • Stage lasts for minutes to days. • Stem cells in...Read more...
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Source: pmc.ncbi.nlm.nih.gov
Title: PMCRadiobiology of the acute radiation syndrome
Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC3863296/Source snippet
NIHby MM i Garau · 2011 · Cited by 196 — The estimate dose threshold for vomiting at the prodromal phase is 1.5 Gy and the time of...
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Source: remm.hhs.gov
Title: Time Phases of Acute Radiation Syndrome (ARS)Vomiting
Link: https://remm.hhs.gov/ars_timephases4.htmSource snippet
Onset: <30 minutes after exposure; Percent of victims who vomit at this dose: 100%; Diarrhea. Heavy; Onset: 1-3 hours after exposure; Pe...
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Source: zenodo.org
Link: https://zenodo.org/records/10581488Source snippet
The Legendary Cash-Landrum Case: Radiation Sickness...29 Jan 2024 — Cash-Landrum Case: Radiation Sickness allegedly witnessed, at close...
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Source: Wikipedia
Title: Cash–Landrum incident
Link: https://en.wikipedia.org/wiki/Cash%E2%80%93Landrum_incident -
Source: spreaker.com
Link: https://www.spreaker.com/episode/the-cash-landrum-incident-the-ufo-case-that-took-the-u-s-government-to-court–71677042Source snippet
The Cash-Landrum Incident: The UFO Case That Took...28 Apr 2026 — Within hours, all three witnesses began suffering strange phys...
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Source: science.howstuffworks.com
Title: How Stuff Works The [Cash-Landrum UFO Incident]({{ ‘cash-landrum-ufo-incident/’ | relative_url }})
Link: https://science.howstuffworks.com/space/aliens-ufos/cash-landrum-ufo-incident.htmSource snippet
The Cash-Landrum UFO IncidentJanuary 1, 1970 — Vickie Landrum (left) and Betty Cash fell victim to radiation sickness after...
Published: January 1, 1970
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Source: cdc.gov
Link: https://www.cdc.gov/radiation-emergencies/[mediaSource snippet
A Brochure for Physicians: Acute Radiation SyndromeSymptoms are anorexia, severe nausea, vomiting, cramps, and diarrhea. • Onset occurs w...
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Source: nature.com
Link: https://www.nature.com/articles/s41420-025-02525-6Source snippet
Gastrointestinal acute radiation syndrome: current...by ML Freeman · 2025 · Cited by 13 — Patients with GI-ARS experience a prodro...
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Source: cdc.gov
Title: acute radiation syndrome
Link: https://www.cdc.gov/radiation-emergencies/signs-symptoms/acute-radiation-syndrome.htmlSource snippet
Acute Radiation Syndrome | Radiation Emergencies10 Apr 2024 — Some symptoms of Acute Radiation Syndrome (ARS) include nausea, vomiting...
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Source: Wikipedia
Title: Acute radiation syndrome
Link: https://en.wikipedia.org/wiki/Acute_radiation_syndromeSource snippet
Acute radiation syndromeSymptoms can start within an hour of exposure, and can last for several months.... Early symptoms are usually...
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Source: youtube.com
Title: The Cash
Link: https://www.youtube.com/watch?v=t6sV0LIy7GISource snippet
LANDRUM INCIDENT | MOST CREDIBLE UFO CASE IN HISTORY...
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Source: unboundmedicine.com
Link: https://www.unboundmedicine.com/5minute/view/5-Minute-Clinical-Consult/1688608/3.3/Radiation_SicknessSource snippet
Time between radiation and the development of prodromal symptoms of nausea/vomiting is essential for helping estimate total dose...Read...
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Source: nuemblog.com
Link: https://www.nuemblog.com/blog/acute-rad-injuriesSource snippet
For the next 4-5 days...Read more...
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Source: pmc.ncbi.nlm.nih.gov
Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC3863169/Source snippet
management of the acute radiation syndrome - PMCby M López · 2011 · Cited by 215 — At doses < 1.5 Gy, only the prodromal phase of nausea...
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Source: restoredcdc.org
Link: https://restoredcdc.org/www.cdc.gov/radiation-emergencies/signs-symptoms/acute-radiation-syndrome.htmlSource snippet
Acute Radiation Syndrome | Radiation Emergencies10 Apr 2024 — Some symptoms of Acute Radiation Syndrome (ARS) include nausea, vomiting, a...
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Source: unboundmedicine.com
Link: https://www.unboundmedicine.com/5minute/view/5-Minute-Clinical-Consult/1688608/all/Radiation_Sickness?q=headacheSource snippet
Radiation Sickness | 5-Minute Clinical ConsultThe prodrome appears within minutes to 4 days of postexposure, lasts between a few hours an...
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Source: unboundmedicine.com
Title: · Latent phase
Link: https://www.unboundmedicine.com/5minute/view/5-Minute-Clinical-Consult/1688608/all/Radiation_Sickness?q=Bladder+cancerSource snippet
Radiation Sickness | 5-Minute Clinical ConsultThe prodrome appears within minutes to 4 days of postexposure, lasts between a few hours an...
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Source: mayoclinic.org
Title: Radiation sickness
Link: https://www.mayoclinic.org/diseases-conditions/radiation-sickness/symptoms-causes/syc-20377058Source snippet
Symptoms and causes13 Feb 2024 — But with high exposure, symptoms can begin minutes to days after exposure. Possible symptoms include: Na...
Additional References
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Source: usz.ch
Link: https://www.usz.ch/app/uploads/2021/06/Acute-Radiation-Syndrome-final.pdfSource snippet
Acute Radiation SyndromeA few hours after the dose required to cause the gastrointestinal syndrome has been received, the prodromal stage...
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Source: env.go.jp
Link: https://www.env.go.jp/en/chemi/rhm/basic-info/1st/03-03-03.htmlSource snippet
Ministry of the Environment, JapanProdromal Phase of Acute Radiation Syndrome and...Exposure of 6 to 8 Gy causes 100% incidence of vomit...
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Source: my.clevelandclinic.org
Title: Nausea and vomiting. Vomiting blood. Initial symptoms start
Link: https://my.clevelandclinic.org/health/diseases/24328-radiation-sicknessSource snippet
Sickness (Acute Radiation Syndrome)12 Jun 2024 — the first signs and symptoms of radiation sickness include: Weakness or fatigue...
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Source: facebook.com
Link: https://www.facebook.com/txchronicles/posts/the-cash-landrum-incident-a-night-of-fire-and-mysterydecember-29-1980-betty-cash/1447818930333809/Source snippet
The Cash-Landrum Incident: A Night of Fire and Mystery...Betty's head and neck were blistered, and soon her eyes were swollen shut...
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Source: facebook.com
Link: https://www.facebook.com/tassilosieben/posts/they-saw-a-ufo-and-hours-later-their-bodies-showed-signs-of-radiation-burnswhat-/1508378607955621/Source snippet
tnesses developed serious physical symptoms consistent with...Read more...
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Source: reddit.com
Title: the unsolved cashlandrum incident of 1980 two
Link: https://www.reddit.com/r/UnresolvedMysteries/comments/kdzdoh/the_unsolved_cashlandrum_incident_of_1980_two/Source snippet
The Unsolved Cash-Landrum Incident of 1980, two women...Two women and a child receive radiation poisoning after witnessing military heli...
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Source: podcasts.happyscribe.com
Link: https://podcasts.happyscribe.com/so-supernatural/alien-the-cash-landrum-incidentSource snippet
Your Podcast TranscriptsSo Supernatural - ALIEN: The Cash-Landrum IncidentAlmost immediately after Betty parks her Old Mobile...
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Source: open.spotify.com
Link: https://open.spotify.com/episode/1anvgC8RBvZDoVaE7yeqm0Source snippet
Cash-Landrum UFO Attack | Dark Mysteries21 Nov 2025 — On Dec. 29, 1980, Betty Cash, Vickie Landrum, and her grandson [Colby]({{ 'colby/' | relative_url }}) encountered a...
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Source: journals.healio.com
Link: https://journals.healio.com/doi/10.3928/19382359-20230411-03Source snippet
Injuries: Acute Radiation Syndrome in Children1 Jun 2023 — Gastrointestinal signs and symptoms are common during the prodromal phase of A...
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Source: instagram.com
Link: https://www.instagram.com/reel/C3QU0u9LKy_/?hl=enSource snippet
evening of December 29, 1980.Read more...
Published: December 29, 1980
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