Smell Around the Clock (IMAGE) Brown University Caption Around the circadian cycle, either by degrees or time of day, research subjects showed patterns in when their smell sensitivity peaked. Dots show the peak circadian degree, or time equivalent, for each subject. The purple area shows the average. The further dots are from the center, the greater the degree of sensitivity change at the peak. Credit Herz et. al./Brown University Usage Restrictions with credit 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.