This newest research from the University of California at Berkeley finds sleep, specifically a lengthy afternoon nap, prepares the brain to remember things.
In this case the nap was about 100 minutes during a break.
There is also one more twist: the study found people's ability to learn declines about 10 percent between noon and 6 p.m. normally. But the nappers were able to negate that decline.
Other recent research has found that sleep can help you think more creatively, have better long term memory and preserve important memories.