Figure 3 (IMAGE) University of Helsinki Caption While much research on nature’s calendar has so far focused on events occurring in the spring, the massive data set compiled by researchers across the former Soviet Union include events from all parts of the year – such as the timing of autumn colouration in trees. Credit Svetlana Bondarchuk 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.