What is the world's tallest tree?
How big can a cactus grow?
Why do plants grow tall?
Read How Big Is Big? to learn about some of the world's tallest, longest, and widest plants. Find out how we measure plants and see how different plants compare.
Books in the Measuring and Comparing series look at simple measurements and what they mean. Each book explores the tools and units we use to measure, and gives a range of examples. Simple scale diagrams put the measurements in context and show how different objects compare. An activity at the end allows readers to put what they have learned into practice.