The new socks are able to store as much as 648 milliliters of urine, almost 22 ounces, using a network of integrated tubes. When the user walks, the liquid is forced through microbial fuel cells that contain bacteria that consume the nutrients in urine and create electricity in that process. In experiments, the researchers were able to use the socks to power a wireless transmitter, broadcasting a message every two minutes. It's not a totally new idea to use urine in the generation of electricity, although the techniques involved normally use an electric pump to provide the pressure to force...