Weak radiofrequency fields affect the insect circadian clock.
J R Soc Interface. 2019 Sep 27 ;16(158):20190285. Epub 2019 Sep 18. PMID: 31530135
It is known that the circadian clock incan be sensitive to static magnetic fields (MFs). Man-made radiofrequency (RF) electromagnetic fields have been shown to have effects on animal orientation responses at remarkably weak intensities in the nanotesla range. Here, we tested if weak broadband RF fields also affect the circadian rhythm of the German cockroach (). We observed that static MFs slow down the cockroach clock rhythm under dim UV light, consistent with results on thecircadian clock. Remarkably, 300 times weaker RF fields likewise slowed down the cockroach clock in a near-zero static magnetic field. This demonstrates that the internal clock of organisms can be sensitive to weak RF fields, consequently opening the possibility of an influence of man-made RF fields on many clock-dependent events in living systems.