Clean
Part of the Series: How We Got to Now

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How We Got to Now - with Steven Johnson
PBS
Join best-selling author Steven Johnson to discover extraordinary stories behind six remarkable ideas that made modern life possible, the unsung heroes who brought them about and the unexpected and bizarre consequences each of these innovations triggered.
Cold
Part of the Series: How We Got to Now
Only in the last 200 years have humans learned how to make things cold. Johnson explains how ice entrepreneur Frederic Tudor made ice delivery the second biggest export business in the U.S. and visits the place where Clarence Birdseye, the father of the frozen food industry, experienced his eureka moment.…
Time
Part of the Series: How We Got to Now
The world today is obsessed by time. Johnson boards a submarine to discover what a lack of natural light means for a sailor's working day and visits Heathrow, the world's busiest airport, to try to get timings right at air traffic control. The story of getting a grip on time…
Sound
Part of the Series: How We Got to Now
Imagine a world without the power to capture or transmit sound. Journey with Johnson to the Arcy sur Cure caves in northern France, where he finds the first traces of the desire to record sound -- 10,000 years ago. He also learns about the difference that radio made in the…
Coal: Convenient, Energy-Dense Fuel
Episode 6 of The Science of Energy
Understand one of energy's most polarizing topics: coal. Where does coal come from, and how does it develop? What makes coal "clean" or "dirty"? Why do certain nations have the largest coal reserves? What are some advantages to coal energy? And how does strip mining impact the environment?
The Science of Energy - Resources and Power Explained
Energy is, without a doubt, the very foundation of the universe. It's the engine that powers life and fuels the evolution of human civilization. Yet for all its importance, what energy really is and how it works remains a mystery to most non-scientists. For example:
  • Where does most of…
Fluid Statics: The Tip of the Iceberg
Fluid is matter in a liquid or gaseous state. In this episode, study the characteristics of fluids at rest. Learn why water pressure increases with depth, and air pressure decreases with height. Greater pressure with depth causes buoyancy, which applies to balloons as well as boats and icebergs.
The Strange Behavior of Water
Episode 9 of The Nature of Matter
Analyze one of the weirdest of all substances: water. While we think of water as normal, its boiling, freezing, dissolving, and heat-storing properties are quite extraordinary compared to other molecules. Discover why this is and what water's attributes have to do with the existence of life.
Einstein's Relativity and the Quantum Revolution - Modern Physics for Non-Scientists, 2nd Edition
"It doesn't take an Einstein to understand modern physics," says Professor Wolfson at the outset of these twenty-four lectures on what may be the most important subjects in the universe: relativity and quantum physics. Both have reputations for complexity. But the basic ideas behind them are, in fact, simple and…
Time Travel, Tunneling, Tennis, and Tea
What are the two big ideas of modern physics? How can nonscientists gain a handle on these ideas and the radical changes they bring to our philosophical thinking about the physical world?
Heaven and Earth, Place and Motion
Understanding motion is the key to understanding space and time. Is there a "natural" state of motion? Learn why the ancients gave different answers to this question, and how Copernicus, Kepler, and Galileo laid the foundation for a new approach.
The Clockwork Universe
Isaac Newton was born in 1642, the year that Galileo died. You'll learn how he built on the work of Galileo and Kepler, developing the three laws of motion and the concept of universal gravitation. You'll learn why Newton's laws suggest a universe that runs like a clock.