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Leaders of World War II
Inside GPS
Today, GPS satellites orbit the earth. They send signals to GPS receivers in cars, smartphones, computers, and drones. Inside GPS introduces readers to the uses of GPS, the …
Nutrition and Your Body: Your Body on Salt
Salt is the only rock people eat. The human body needs it to survive. But it does not need much. Your Body on Salt uncovers the nutritional benefits of salt, how it interacts with …
What Would It Take to Build a Time Machine?
In science fiction, time machines let people travel backward in history and forward to the future. How could one of these time-traveling devices be created? Scientists have some …
The Bermuda Triangle
Inside GPS
Today, GPS satellites orbit the earth. They send signals to GPS receivers in cars, smartphones, computers, and drones. Inside GPS introduces readers to the uses of GPS, the …
North Dakota
Inside 3D Printers
Today, people use 3D printers to build houses, airplane parts, food, and even living tissue. Inside 3D Printers introduces readers to the uses of 3D printers, the hardware and …
How Do Robots Defuse Bombs?
The military and police use robots to stop bombs from exploding. Read this book to discover how engineers create these life-saving machines.