Animals are known to predict Earthquakes right? We know this already and we have a pretty good idea how they are doing it too. You see we believe they pick up the vibrational changes in Mother Earth, as our Planet has a certain resonance. When it changes the animals being very close to nature without all this frequency pollution sense something is not right. Humans probably can do the same thing too, but we are so over bombarded with frequency pollution and information over load we do not recognize the changes as readily.
This subject recently came up in an online think tank when one member who has been studying this topic stated;