Profiles one hundred inventions in chronological order, from roads and the screw to the World Wide Web and cloning, describing how each was invented, what peopl

Explore the bright ideas that changed the way we live. Learn how cell phones work, which ancient people used water to tell the time, and why early bicycles were

Exactly 100 numbered facts will challenge children, acting as an incentive as they make their way through these books. Projects to make and do, hilarious facts

Collects one hundred facts about inventions, describing inventors and inventions that have improved aspects of warfare, agriculture, and life for man since the