Monday, August 25, 2008

Using a cow for a compass?

Cows seem to know how to find north and south, say researchers who have studied satellite photos of thousands of cows around the world. The cattle which were grazing or resting tended to align their bodies in a north-south direction, a team of German and Czech researchers reported in the Proceedings of the National Academy of Sciences. And the findings held true regardless of the continent, according to the study led by Hynek Burda and Sabine Begall of the faculty of biology at the University of Duisburg-Essen in Germany. "The magnetic field of the Earth has to be considered as a factor," the scientists said.