The article reports that a number of German scientists have developed a way to harness body heat in order to provide power to basic electrical devices. The author explains that the researchers have discovered that the heat from a human body can generate enough electricity to keep learning tools powered up even in the most remote locations. Such energy depends on the principle of thermoelectric generators, which extract energy from the temperature difference between hot and cold. In order to gather the necessary amount of power, the system utilizes a charge pump to collect and store the voltage.