Richard Semon was a German zoologist and psychologist, born in 1859 and known for his work in the field of memory. He introduced the concept of the "engram," which refers to the physical trace of a memory in the brain. His research laid the groundwork for later studies in psychology and neuroscience. Semon's ideas were influential in understanding how memories are formed and stored. He published several works, including "Die Mnemischen Empfindungen," where he explored the relationship between memory and behavior. His contributions continue to be relevant in discussions about memory, cognition, and related fields like neuroscience and psychology.