This document discusses various topics related to how adults learn, including brain development and function, memory, learning styles, attention span, and accelerated learning. It provides information on how the brain works, how we remember and forget, and factors that influence learning like stress and emotions. It also discusses the three levels of memory (sensory, short-term, and long-term), different learning styles (visual, auditory, kinesthetic), the average adult attention span of 15-20 minutes, and techniques for making learning memorable like teaching others or using audio/visual aids.