Take on the extra challenge of a round puzzle! As you puzzle, learn the building blocks of biodiversity - the wide variety of organisms that make up all the life on our planet. Like a jigsaw puzzle, every organism is an integral part of a larger, vital whole. Try the eeBoo's Biodiversity 500 pc Round Puzzle and get the big picture! The challenging jigsaw is illustrated by Kelsey Oseid. Puzzle features this quote: “This is the assembly of life that took a billion years to evolve. It has eaten the storms - folded them into its genes - and created the world that created us. It holds the world steady” from Edward O. Wilson. Edward O. Wilson, known as the father of biodiversity, is a two-time Pulitzer Prize winner and the world’s leading expert on the study of ants. Educational Toys Planet's bio themed puzzle comes with 500 pieces made from 90% recycled gray board and printed with vegetable based inks. Completed puzzle is 23 inches in diameter.