Dean Kamen, the mastermind behind 440 inventions, including the segue, is more than just a brain. He’s also got a huge heart, and uses technology and inventions, which include prosthetic limbs, a wearable infusion pump for chemotherapy and diabetic patients, the independent IBOT non-wheelchair, to combat disease, improve the lives of the disabled, and make the world a better place. Tonight, on the Colbert Report, Dean made the Colbert Nation a better place by showing Steven his “Stirling engine,” a machine that will purify water cheaply. This is important because

in some places, the average amount of time per day spent looking for water that’s safe for their kids by women is four hours. And they carry this stuff, which weighs 62 pounds per cubic foot, four or five miles. And if it didn’t turn out to be the right stuff, or they put their hands in it and contaminated it, they spend the next day or two burying the babies.

You can see Dean on the Colbert Report last year.

Watch Dean talk to actress and activist Isabella Rossellini on the Sundance Channel’s Iconoclasts series. You’ll be inspired to ! So find out how by visiting FIRST, a non-profit founded by Dean to transform our culture by creating a world where science and technology are celebrated and where young people dream of becoming science and technology heroes.”Good night, nation.