Recent research reveals that one of the best ways to stop memory loss is laughter. In fact, laughing may go one step further and actually improve a person’s memory. According to a report by ABC News, a group of scientists from California’s Loma Linda University tested 40 people on the effects of laughter. They were divided into two groups. They asked one group of 20 to watch a funny film that lasted about 20 minutes and told the second to calmly wait until the other group was done. When the movie was over, the two groups were given memory tests. Saliva samples were also taken from each person, and they were tested for the stress hormone cortisol, as stress can have a negative impact on memory.