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32 pages : illustrations (chiefly colour), portraits Summary: You might not realize that there was once a world without microwaves, umbrellas, or elevators. That's a lot of cold food, wet clothing, and stairs! Luckily some innovative people have solved problems in everyday technologies throughout history. Learn all about the gadgets, structures and materials we depend of everyday and the amazing inventors, scientists, and engineers who dreamed them up! Problem solved! Your turn to think big