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Why does your heart race when you run fast? Why is blood red? This encyclopedia will answer these and more whys for you. Learning is made simpler with well-labelled diagrams and an extensive glossary of difficult words. Bonus The book comes loaded with Isn't It Amazing — a section of fun facts to keep you glued for more. Learning can be fun! •
Why does your heart race when you run fast? Why is blood red? This encyclopedia will answer these and more whys for you. Learning is made simpler with well-labelled diagrams and an extensive glossary of difficult words. Bonus The book comes loaded with Isn't It Amazing — a section of fun facts to keep you glued for more. Learning can be fun! •