In spring, a snapping turtle lays her eggs on the hillside beneath the tree. In autumn, leaves fall as squirrels scamper up the trunk carrying nuts. And on a winter night, a backdrop of twinkling stars shines through the branches. Each day, the tree changes with the purple and pink of a sunset or a nip of cold air. But the tree is more than a thing of beauty--its changes represent the passage of time in nature. In this stunning book by Thomas Locker, who was seven years old when he won his first award for a painting of a tree that still stands in the National Zoo, exquisite paintings and wondrous text are paired with questions about nature, and science comes alive through art.