Every spring and fall Americans turn the clocks back or forward one hour to make the best use of the daylight. It’s called Daylight Savings Time. When the clocks are turned back in the fall, it will be brighter in the mornings as we go to school and to work. New research shows this time change has a big downside: an increase in crime. By looking at crime patterns, researchers discovered that robbery rates increase when it's darker for a longer time in the evenings. Listen to this story and have students gather evidence for a debate about whether or not we should keep Daylight Savings Time.