In the book’s introduction, author and neuroendocrinologist Robert Sapolsky explains his fascination with the biology of violence and other dark parts of human behavior.
Researchers say they hope to launch a clinical trial to test bumetanide, a diuretic approved in 2002, but how it might improve neural functioning is unclear.
Technologies such as noninvasive brain stimulation and virtual reality gaming offer insights into how dreams arise and what functions they might serve.