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How the gateway arch tram cars really work

Explore the mechanics and technology of the tram system that transports visitors up the Gateway Arch in this informative 3D ...

This founder went from designing Happy Meal toys to making prosthetic skulls for a living—and her company now rakes in $20 million a year

Entrepreneur Nancy Hairston founded 3D medical-design company MedCAD after designing McDonald’s Happy Meal toys and Bratz ...