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How did dinosaurs evolve?What is the centre of Earth like?Are there mummies inside the pyramids?Turn the pages to find the answers to these and many other intriguing questions! Learn about gladiators, how the ozone layer acts like sunscreen and why animals grew legs, plus much more!Juniorpedia is an exciting reference book series packed with mind-blowing facts and eye-catching pictures, perfect for budding scientists, intrepid explorers and daring planet protectors!