There are huge varieties of birth control methods because there are lots of different ways to disrupt the process of sperm-egg fertilization.

During the period of rapid industrialization at the turn of the 20th century, factory jobs were incredibly unsafe. That is, until Dr. Alice Hamilton basically became an investigative reporter to figure out how factories were poisoning...

From shipping routes to airplane traffic to even the Internet, transportation planning is all about designing optimal transportation networks to move goods, information, and people around the globe. Today, we're going to discuss...

In the ongoing debate about globalization, what's been missing is the voices of workers -- the millions of people who migrate to factories in China and other emerging countries to make goods sold all over the world. Reporter Leslie T....

In this perspective-shifting talk, energy researcher Rose M. Mutiso makes the case for prioritizing Africa's needs with what's left of the world's carbon budget, to foster growth and equitably achieve a smaller global carbon footprint.

In which John Green teaches you about World War 2, as it was lived on the home front. You'll learn about how the war changed the country as a whole, and changed how Americans thought about their country. John talks about the government...

economic growth has been slowing for the past 50 years, but relief might come from an unexpected place -- a new form of manufacturing that is neither what you thought it was nor where you thought it was. Industrial systems thinker...

Squeaks and Jessi have a story to tell you about the peppered moth, a special insect that taught us a lot about a process called natural selection.

Accepting his 2005 TED Prize, photographer Edward Burtynsky makes a wish: that his images -- stunning landscapes that document humanity's impact on the world -- help persuade millions to join a global conversation on sustainability.

An unnoticed industry worth two trillion dollars a year is influencing almost every carbon emission. Sustainability solution seeker Solitaire Townsend calls this sector the "X industry" (where "X" stands for influence), and it includes...

Australians call them “runners." The British know them as “trainers.” Americans refer to them as “sneakers.” Whatever you call them, these casual shoes are worn by billions of people around the world. Today, roughly 23 billion shoes are...

“The Power of Invention” examines how technologies of the past and present have caused social change.

In this video we ask what was the agricultural revolution, what made it possible and what were its effects.

This WW II short film contrasts America's free industrial labor force with the subjugation of laborers in countries overtaken by Axis powers in an attempt to raise public support for the war effort. It stresses the fact that World War II...

On today FRAME feature, let's explore the technically detailed and intricate production lines for assembling some of the world most powerful aircraft engines made by Rolls Royce.

In this episode, we’ll explore the Russian Revolution—a time when people in Russia rose up to change their country. You’ll learn why many were unhappy with the king, or czar, and how workers and soldiers demanded a new way of life. We’ll...

The Panic of 1819, triggered by land speculation, reduced exports and a cutback in credit, led to America's first major financial crisis and reshaped its economic policies.

In 1906, Upton Sinclair's novel The Jungle, about conditions in industrial meat packing plants, was published. It was a fictionalized account of what it was like in the meat packing industry, and how horrible working conditions were in...

In this interview, Bill Gates reflects on his early warning about the potential for a global pandemic, explaining how respiratory viruses can be highly transmissible and deadly. He discusses the lack of preparedness and the need for...

Urban environments may seem very different from one another – but their underlying structures are often remarkably similar. Human Geography - Orientation And Settlements - Learning Points. Every urban settlement has a central business...

A look at the Burgess and Hoyt models, and how each explains the layout of urban settlements. Human Geography - Orientation And Settlements - Learning Points. The Burgess Model shows a city's development as a series of concentric rings,...

Are all artificial chemicals bad for our health? Revealing the health implications of natural and artificial chemicals, and the natural chemicals which can be deadly. Chemistry - Chemical Industries - Learning Points. All matter consists...

Life on Earth could not exist without water. However, human activities can cause water pollution. How can we prevent this?
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This film examines the tell-tale signs of air pollution and how its effects can be catastrophic to ecosystems.
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