Question: Ylem was a term used by the physicist who was a developer of the theory credited to whom?
Sentence (from "Ylem"): Ylem is a term that was used by George Gamow, his student Ralph Alpher, and their associates in the late 1940s for a hypothetical original substance or condensed state of matter, which became subatomic particles and elements as we understand them today.
Relevant evidence: Yes