Great introduction to the neuroscience of dreams on Netflix series, "The Mind Explained", episode two, "Dreams."One curious topic has to do with which animals dream, in which they suggest that many, if not all animals dream. Especially interesting is the discussion about how some species of birds "dream" to create new songs. Raises interesting questions about how we define a "dream." See our reference: Siegel, Jerome M. 1998. “The Evolution of REM Sleep.” In Handbook of Behavioral State Control, edited by Ralph Lydic and Helen A. Baghdoyan, 7.7–7.8. Boca Raton: CRC Press.