Profiles the systems that work together to keep urban areas running safely, discussing how cities have evolved since the first riverside settlements while outlining projects that explain facts about transportation, water systems, and architecture.

An introduction to artificial intelligence offers activities, including taking a Turing test, detecting patterns, and making a robot.

"Getting from one place to another sounds easy if you are on a straight piece of land, but what if you have to get over - or under - a body of water or a deep gorge? Build a bridge! Bridges are the great connectors. They allow us to travel the twists and turns, highs and lows, ins and out of every geographic feature in our world. Bridges! With 25 Science Projects for Kids introduces readers ages 7 to 10 to the concepts and vocabulary of bridge construction...

Learn why projectiles follow the paths they do and what factors influence those paths. Readers who are fascinated with potato cannons, slingshots, and rocketry will love taking that next step and applying what they learn about the laws of physics to the science of figuring out where to aim.

Follows Dorothy Vaughan's path from math teacher to "human computer" as well as her success as first African American supervisor at her company.

"When might a fancy leaf costume be useful for a fish? And how do fish in Antarctica keep from freezing? In [this book], children ages 5 to 8 discover some of the amazing adaptations in the world of fish. Explore underwater habitats and discover the ways fish have evolved to avoid the danger that lurks around every waving piece of seaweed. Detailed illustrations, layered text, a hands-on activity, and plentiful back matter spur kids to dive further...

A science biography that examines the life and work of Ben Franklin and offers kids the opportunity to make their own designs and inventions with hands-on activities.

"In The Science and Technology of Marie Curie, readers ages 9 through 12 explore Curie's groundbreaking scientific research in physics and chemistry and discover how her work forced people to rethink the very structure of the surrounding world and the role of women within it. Her commitment to understanding things the human eye can't even see led to the discovery of two new elements--polonium and radium--and to the birth of a new field of research...