Almost a century after the discovery that sleep helps us remember things, scientists are beginning to understand why.

During sleep, the brain produces chemicals that are important to memory and relives events we want to remember, scientists reported this week at the Society for Neuroscience meeting in Washington D.C.

Image: "Soul Sailing" by Missy Rogers
Missy Rogers

How can I best pass ancestral wisdom to those who follow: with physical objects OR stories?