The IEEE Spectrum magazine has an interesting study of "Of Cows and Power Lines" (related articles:1,2), which states that Cows (amongst some other animals) naturally align in an North/South direction.
Studies also found that this orientation is distorted when Cows are close to power lines.
What's interesting to Google is that the studies are using Google Earth to find the herd of cattles and power lines. Google is surely achieving the mission of "organize the world's information and make it universally accessible and useful." =)