Dogs are sensitive to small variations of the Earth's magnetic field

3 years ago



Authors measured orientation of dogs' bodies during waste elimination, and found body axes aligned significantly to the North-South line, but only during periods of high magnetic field stibality (about 1 day in 5). They conclude that dogs are among the species able to sense the direction of the magnetic field.




The Rayleigh test isn't appropriate here - it only determines whether a circular random variable is different from purely random. Of course the distribution of dogs' orientation won't be uniform - the null hypothesis should admit for the possibility of orienting along very regular features like street directions, the direction of the sun, etc.

Re: Rigor