Ether in Ethereum comes from one of the five elements that constitute the world imagined by the ancient Greek philosopher Aristotle. Scientists in the 19th century once hypothesized the existence of ether as a conductive medium for electromagnetic waves. This hypothesis was overturned by the theories of relativity, superstring theory, and quantum mechanics in the 20th century. In Marvel comics, the Aether is made into the Reality Stone, a causal weapon that ignores all scientific laws, real logic, or natural laws.