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Hard House M.D.

In House M.D., what physical injury causes House to walk with a cane?

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Easy Leonardo Da Vinci's Inventions

What type of machine was Leonardo da Vinci’s mechanical knight designed to be?

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Hard Leonardo Da Vinci's Inventions

What type of machine did Leonardo da Vinci design to cut wood using a powered blade?

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Intermediate Leonardo Da Vinci's Inventions

What mechanical component did Leonardo da Vinci draw using interlocking spheres to reduce friction?

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Easy Leonardo Da Vinci's Inventions

What was Leonardo da Vinci’s armored vehicle design intended to function as?

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