Transcutaneous Electrical Nerve Stimulation (TENS) is one of those things that sounds like it must be woo when you first hear ...

A TENS machine is small -- about the size of an iPad mini. It’s connected to a series of electrodes, which are put on your skin to deliver a low-voltage electrical charge. The electrical pulses ...

Rio de Janeiro bus drivers on Tuesday began a 48-hour strike that left tens of thousands of people without transportation and caused huge problems in Brazil's second-largest city. Participation in the ...

Rio de Janeiro was once again racked by violent protest on Tuesday night as a teachers strike became the latest rallying point for public discontent over public services and police brutality. Several ...