Smoke (IMAGE) Weizmann Institute of Science Caption This image shows smoke. Weizmann Institute of Science researchers exposed smokers to pairs of smells -- cigarettes together with that of rotten eggs or fish -- as the subjects slept, and then asked them to record how many cigarettes they smoked in the following week. The study revealed a significant reduction in smoking following conditioning during sleep. Credit Weizmann Institute of Science Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.