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 the body, and how to include it as part of a balanced diet.
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 hardware and software that make GPS possible, and the future of GPS technology.
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 software that make 3D printers possible, and the future of 3D printing technology.
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