If you want to witness your tax dollars at work bringing technology to previously untapped markets, you need look no further than the "Ear-A-Round" being developed by the U.S. Department of Agriculture and the Massachusetts Institute of Technology. The headset is worn by cows (I'm not making this up) and contains stereo earphones to help guide cattle through sounds. Each headset contains a solar cell for powering a GPS tracking device. The goal is to be able to monitor and control cattle movement to better improve land usage and reduce overgrazing. This technology would theoretically allow ranchers to monitor cattle movement remotely and issue audible cues to get the herd moving to new locations. The first field tests will begin later this month on the Jornada Test Range in southern New Mexico.