NASA scientists are said to have invented a lot of household items over the decades. Some, like Velcro, or Tang, or the first cordless power tools, are misattributions. But other claims are totally legit. And you probably own at least...

When James Edward Hanger lost a leg in the American Civil War, he returned home to Virginia and designed the world's first articulated prosthetic that could bend like a real leg.

Designed in 1775, the Turtle Submersible was a military submarine that pushed the limits of engineering, in an attempt to defeat the formidable British Navy.

Thomas Jefferson’s words helped found a nation. But did you know that he also invented the modern day swivel chair?

They were the Nike Air of their day – and they helped spark a sneaker revolution! Discover how Keds cornered the market for comfortable footwear in the 1950s and beyond.

In 1921, John Augustus Larson invented a machine to help detectives determine if someone was telling the truth - or lying. He called it - the Polygraph.