Tree Rings Of A Pine Tree (IMAGE) Swansea University Caption The preserved rings of a pine tree, that started growing in 1369 and fell into a cold lake in 1716, allow scientists to measure what the temperature was like in the summers of each year's growth and how sunny it was. Credit Risto Jalkanen 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.