How'd They Do That?
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How Do Bionic Limbs Work?
by Meg Marquardt
Part of the How'd They Do That? series
People who lose limbs now have incredible options to help them walk and do other everyday activities. Read this book to learn how engineers are creating bionic limbs to help patients.
ebook
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How Do Wildlife Crossings Save Animals?
by Clara MacCarald
Part of the How'd They Do That? series
Wildlife crossings help keep animals safe from the roads that cross their natural habitats. Read this book to discover how engineers create these structures that protect animals.
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How Do Cars Drive Themselves?
by Marcia Amidon Lusted
Part of the How'd They Do That? series
Today's cutting-edge cars use sensors and powerful computers to see their surroundings and safely drive from place to place. Read this book to learn how engineers design intelligent cars that drive themselves.
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How Do Engineers Reuse Rockets?
by Arnold Ringstad
Part of the How'd They Do That? series
Reusable rockets are making space travel cheaper and more common. Read this book to discover how engineers bring huge rockets to a safe, gentle landing.
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How Do Robots Defuse Bombs?
by Yvette LaPierre
Part of the How'd They Do That? series
The military and police use robots to stop bombs from exploding. Read this book to discover how engineers create these life-saving machines.
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How Did Robots Land on Mars?
by Clara MacCarald
Part of the How'd They Do That? series
After traveling millions of miles through space, roving robots gently landed on Mars and then drove across its surface. Read this book to learn how engineers accomplished these amazing feats of space exploration.
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