3-D printers are expanding the things people create and how they create them. Meet the Colorado man who's considered the father of 3-D printing. Then, art students helped design a 3-D prosthetic for an injured cat. A CU Boulder professor wants children who are blind to experience literature with tactile picture books created with the printers. A Loveland company builds small 3-D printers for home use, and a printer that could turn water to ice, then create homes on Mars.