Liquid metal imbalance of the surface tension induces a pressure difference between the rear and the head, which produces a thrust to drive the droplet toward the head; at the same time, the hydrogen produced in the electrochemical reaction process also further raises the thrust. The discovery of this phenomenon laid the technical foundation for the development of intelligent motors, vascular robots, fluid pumping systems, flexible actuators and even more complex liquid metal robots. Liquid metal Liquid metal consists of alloys with very low melting points which form a eutectic that is liquid at room temperature. The standard metal used to be
Skin-walker Skin-walker In Navajo culture, a skin-walker () is a type of harmful witch who has the ability to turn into, possess, or disguise themselves as an animal. The term is not used for healers. In the Navajo language, ' translates to "by means of it, it goes on all fours". While perhaps the most common variety seen in horror fiction by non-Navajo people, the ' is one of several varieties of Navajo witch, specifically a type of "". The legend of the skin-walkers is not well understood outside of Navajo culture, mostly due to reluctance to discuss the subject with