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MILLS: MICROWAVE RADIATION

Bioeffects Seen

Mills · 1971

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Government scientists were investigating microwave radiation's genetic and non-thermal biological effects decades before cell phones existed.

Plain English Summary

Summary written for general audiences

This 1971 government document cataloged microwave radiation research projects, examining both thermal (heating) and non-thermal biological effects. The research covered genetic impacts, epidemiological studies, and medical applications like diathermy across various organisms. This represents early recognition that microwave radiation could affect living systems beyond just heating tissue.

Why This Matters

This 1971 research catalog reveals that government scientists were already investigating microwave radiation's biological effects over 50 years ago. The inclusion of 'nonthermal effects' and 'genetic effects' as research priorities shows early awareness that microwave energy could harm living systems without heating them - a concept the wireless industry still disputes today. The reality is that concerns about microwave radiation predate cell phones by decades, emerging from military and medical research into radar and diathermy equipment.

What makes this particularly significant is the timing. In 1971, microwave exposure was largely occupational or medical, yet researchers were already studying genetic damage and conducting epidemiological studies. Today, billions carry microwave-emitting devices against their bodies daily, yet we're told the science is 'settled' on safety. This early research agenda suggests otherwise.

Figures from the Original Paper

Diagrams extracted from the original research document.

graphPage 4 - Figure 1: Dispersion of the Permittivity (Dielectric Constant), ε', showing how permittivity changes with frequency for protein and certain other molecules.
p. 4 of the original PDF
diagramPage 6 - Figure 2: Environmental Chamber Used to Cool Laboratory Rodents. The Microwave Source was Essentially CW.
p. 6 of the original PDF
diagramPage 7 - Figure 3: Flow Diagram of Environmental System Now Under Construction
p. 7 of the original PDF

Exposure Information

A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 2.45 GHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 2.45 GHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

Specific exposure levels were not quantified in this study. Duration: 45 minutes for fruit fly studies, 1 hour and 3 hours for rat studies

Study Details

To investigate the biological effects of microwave radiation, particularly distinguishing between thermal and nonthermal effects, and to develop standards for radiation protection.

The study includes epidemiologic research on radar workers and diathermy patients, experimental stud...

Experiments showed that 2450 MHz microwaves at 100 mW/cm² caused death in rats within 172 minutes wi...

The research indicates that while thermal effects are evident, nonthermal effects may exist at low exposure levels. Molecular-level interactions with proteins and water molecules were observed. The development of controlled environmental systems will help resolve the thermal-nonthermal controversy and determine biological effects under precisely controlled conditions.

Cite This Study
Mills (1971). MILLS: MICROWAVE RADIATION.
Show BibTeX
@article{mills_microwave_radiation_g3726,
  author = {Mills},
  title = {MILLS: MICROWAVE RADIATION},
  year = {1971},
  
  
}
No DOI on file for this study.

Quick Questions About This Study

The 1971 research catalog included thermal effects, non-thermal effects, genetic effects, epidemiological studies, and diathermy applications. This shows government scientists recognized microwave radiation could affect living systems through multiple biological pathways beyond simple heating.
Including genetic effects as a research priority indicates early scientific concern that microwave radiation could damage DNA or affect reproduction. This suggests government researchers suspected microwave energy might cause hereditary harm decades before widespread consumer exposure.
Non-thermal effects refer to biological changes from microwave radiation that occur without heating tissue. The 1971 inclusion of this category shows early recognition that microwave energy could harm living systems through mechanisms other than temperature increase.
In 1971, microwave exposure was mainly occupational or medical, yet researchers studied genetic damage and epidemiological effects. Today's consumer devices expose billions daily to similar radiation, making this early research agenda particularly relevant for modern safety questions.
Diathermy research examined medical applications using microwave radiation to heat deep tissue for therapeutic purposes. Including this alongside genetic and non-thermal effects research shows scientists were studying both beneficial medical uses and potential biological harms.