In this episode, the History Guys consider the advent of air conditioning, and explore its far-reaching implications on everything from architecture and leisure to demography and politics. They also look at what happened when stoves became widely available in the mid-19th century, and how technology altered Americans' way of life.

We're devoting this episode of BackStory to maps - asking how the ways in which Americans have mapped geography illustrate the ways in which Americans have understood themselves socially.

In this episode, BackStory takes on big oil! And big trees, big water, big whales.. How have changing energy sources shaped the growth and decline of cities and towns? What are the social costs and benefits of new energy technologies?

It seems that Americans are finally waking up to the reality of climate change, but scientists tell us it may be too little, too late. This may be the most far-reaching environmental threat Americans have ever faced, but it’s certainly not the first. In this hour, we consider the history of American anxieties about the [...]