What is the tallest living thing? It''s not an elephant, or a giraffe, or even a blue whale. It''s a tree!Trees are the tallest living things on Earth. But how do they grow to be so tall? Science writer Rebecca E. Hirsch presents a poetic introduction to the tree life cycle in Rise to the Sky. Accompanied by Mia Posada''s detailed collage illustrations, this book features the tallest tree species from around the world, including the coast redwood, the Sitka spruce, and the giant sequoia.