magnetism

By Ker Than Tropical leafcutter ants don’t need to stop and ask for directions—they have internal magnetic compasses that help them navigate.  Now, scientists have figured out just how the insects get their “sixth sense,” which is also found in an increasing number of animals, including birds, bats, and rodents. (See “5 Amazing Animal Navigators.”)...

By Ker Than Tropical leafcutter ants don’t need to stop and ask for directions—they have internal magnetic compasses that help them navigate.  Now, scientists have figured out just how the insects get their “sixth sense,” which is also found in an increasing number of animals, including birds, bats, and rodents. (See “5 Amazing Animal Navigators.”)...