2009 年 37 巻 1 号 p. 7-9
Why dinosaurs became so large and why they became extinct are two of the great mysteries of biology. However, no theory has yet succeeded in explaining the biotic transitions adequately. In a previous meta-analysis, we found that exposure to an extremely low frequency electromagnetic field (ELF-EMF) was associated with an increase in animal body weight. In the present paper, we propose that the large body size of the dinosaurs was caused by ELF-EMFs generated by natural phenomena: geomagnetic storms, volcanic activity, earthquakes, or Schumann resonance. To support this hypothesis, we researched long-term data on changes in these processes. We found that there was a high level of crustal change during the age of the dinosaurs. We propose that Ultra-low frequency (ULF) /ELF-EMFs produced by widespread earthquakes and volcanism caused the dinosaurs to become larger, then when these phenomena were no longer so prevalent, the dinosaurs became extinct for a number of reasons, among them the loss of ULF/ELF-EMFs.
