In the average lifetime, your heart beats 2.5 billion times, moving about five and a half quarts (5.5 liters) of blood at 3-4 mph (4.8-6.4 kph). This is about the walking speed of the average person. Harnessing such energy could offer significant capabilities. These researchers have passed a milestone. This is the world’s first attempt to use the body as a means of generating electricity.