Night Owls and Early Birds (image) Aalto University Share Print E-Mail Caption Night owls (blue) are more central than early birds (orange) in their social networks. Each circle represents one person, and the lines connecting the circles are indicative of interactions (phone calls) between them. Credit Jari Saramäki, Talayeh Aledavood / Aalto University Usage Restrictions None Share Print E-Mail 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.