Host Mo Rocca shows us: the physics behind an extreme slip and slide; how inventors use crowdfunding to bring their ideas to the world; the stealth invention of the V-8 engine; and updates of some favorite innovators profiled on Innovation Nation.

Host Mo Rocca shows us the innovator making sure you stand up straight; the app to protect your loved ones while walking alone; an invention making water out of thin air; the history of grinding grains in the grist mill.