Jellyfish Sense Their Environment for Controlled Migration

Jellyfish are not exactly the quarterbacks (or leatherbacks) of the animal kingdom, but they have surprised researchers with their ability to swim against the tide, just like baby leatherback turtles do. Scientists even think they may be able to sense the earth's magnetic field, as do turtles, salmon, birds, and other long-distance migrators. The BBC News comments on new findings from Australia:

The scientists think the animals might sense the current across the surface of their bodies. They...