The Engines of Our Ingenuity 1638: Floating Airports

Episode: 1646 Thinking about who had done what by what age. Today, who did what by when?

Episode: 1645 Figuring out the value of Pi. Today, let's talk about π -- and not the kind you eat.

Episode: 3424 Anne Brigman brings a wild new dimension to the early years of photography. Today, Anne Brigman’s photographs.

Episode: 3423 Protocols: From diplomatic procedures to computer communications standards. Today, we examine how protocols have shaped communication throughout the evolution of humans as well as that of the machines they create.

Episode: 3422 Women soldiers in the Civil War. How did that work? Today, woman soldiers in the Civil War.