By Sid Perkins
Normal 0 false false false MicrosoftInternetExplorer4 In a forest, the north side of a tree is covered with moss. But if you’re lost in an open field, look to the deer to point you in the right direction.
Herds of grazing and resting deer and cattle tend to align themselves with Earth’s magnetic field lines, a hint that the large mammals can somehow sense the invisible field, a new analysis suggests.