A research team from Seoul National University has unveiled a groundbreaking, ultra-flat wearable generator, dubbed the 'pseudo-lateral thermoelectric generator.' Their findings have been published in the esteemed journal Science Advances. Traditional thermoelectric generators harness temperature differentials to produce electricity. For wearable applications, these generators must be transformed into thin, lightweight films. However, such films often lead to the vertical dissipation of body heat, diminishing their power generation efficiency. Attempting to enhance them through conventional methods risks sacrificing the devices' lightweight and flexible nature. Therefore, the team took a novel approach, focusing on structural innovation. They employed a specially crafted elastic silicone substrate to channel body heat laterally, effectively segregating hot and cold zones on a flat plane to establish a functional temperature gradient. Manufactured through an ink-printing process, the device's internal components can be modularly assembled, catering to a diverse array of wearable requirements.