Abstract
A significant correlation of 877 between lunar distance at the time of birth and the number of squares traversed in a open-field situation 21 to 25 days later was found for 19 litters that had been exposed continuously during their prenatal development to a 0.5 Hz, 3 to 30 gauss Rotating Magnetic Field (RMF), over a year. RMF-exposed litters that were born on or near lunar perigees traversed fewer squares in an open field than those born on or near apogees. RMF-exposed litters tested “blind” also showed the relationship between lunar distance at time of birth and later open-field activity. 12 control litters did not show a significant correlation (.101).