Episode – 1450 : Air Conditioning Podcast Transcript One of the biggest problems that humanity has faced for thousands of years is heat. Excessive heat made it difficult to work […]
Episode – 1445 : The History of Skyscrapers
Episode – 1445 : The History of Skyscrapers Podcast Transcript If you were to pick a single visible icon to represent the 20th century, it would probably be the skyscraper. […]
Episode – 1440 : The History of Toilets
Episode – 1440 : The History of Toilets Podcast Transcript It is one of the most important inventions in history. Almost everyone listening to this has one. You use one […]
Episode – 1435 : The History of Books
Episode – 1435 : The History of Books Podcast Transcript Books are one of the foundational tools of civilization. They allow us to pass knowledge and information between people who […]
Episode – 1430 : The Apollo Lunar Module
Episode – 1430 : The Apollo Lunar Module Podcast Transcript When President John F. Kennedy set the objective of landing on the moon before the end of the 1960s, no […]
Episode – 1426 : Questions and Answers: Volume 19
Episode – 1426 : Questions and Answers: Volume 19 Podcast Transcript The month of June was originally called Iunius by the Romans. Back then it had 29 days and was […]
Episode – 1408 : Edward Teller and the Development of the H-Bomb
Episode – 1408 : Edward Teller and the Development of the H-Bomb Podcast Transcript During the Second World War, the United States established the highly secret Manhattan Project to develop […]
Episode – 1383 : Batteries
Episode – 1383 : Batteries Podcast Transcript The odds are quite good that somewhere around you right now as you listen to me speak these words, is a battery. Whether […]
Episode – 1362 : Jet Propulsion
Episode – 1362 : Jet Propulsion Podcast Transcript When humans first managed to harness heavier-than-air flight, they did so by using piston engines and propellers. Several decades later, a more […]
Episode – 1358 : Railways
Episode – 1358 : Railways Podcast Transcript Over the last 200 years, railroads have been one of the most important methods of transportation. Railroads helped make the modern world. They […]
Episode – 1344 : The Domain Name System
Episode – 1344 : The Domain Name System Podcast Transcript Behind almost every web page, email address, and podcast is a system that translates addresses understandable by humans to something […]
Episode – 1333 : Leap Year
Episode – 1333 : Leap Year Podcast Transcript Once every 1461 days, sometimes, we have a day on the calendar that we don’t normally have: Leap Day. This extra day […]
Episode – 1330 : Passports
Episode – 1330 : Passports Podcast Transcript Most people in the world are required to have a passport when they travel internationally. Today, there is an international regime covering how […]
Episode – 1313 : All About Eggs
Episode – 1313 : All About Eggs Podcast Transcript Every day around the world, over a billion eggs are consumed. Eggs have become a staple food product used both by […]
Episode – 1293 : The History of Lead
Episode – 1293 : The History of Lead Podcast Transcript Sometime around eight to nine thousand years ago, ancient people in Asia Minor found a very dull grey metal that […]
Episode – 1289 : The London Underground
Episode – 1289 : The London Underground Podcast Transcript The 19th century saw an explosion in population in London. The city grew severalfold and became the largest city in the […]
Episode – 1283 : LEDs: Light Emitting Diodes
Episode – 1283 : LEDs: Light Emitting Diodes Podcast Transcript One of the most important inventions in human history was artificial lighting.With the electric lightbulb, the night could be illuminated, […]
Episode – 1279 : Questions and Answers: Volume 14
Episode – 1279 : Questions and Answers: Volume 14 Podcast Transcript The month of January was named after the Roman god Janus who had two faces, one on each side […]
Episode – 1256 : Copper
Episode – 1256 : Copper Podcast Transcript When humans first learned how to work with metal, the very first metal they used was copper. Copper was easy to shape, easy […]
Episode – 1246 : The History of Farming
Episode – 1246 : The History of Farming Podcast Transcript Over 10,000 years ago, humans began to cultivate and raise crops. Back then, a single farm could maybe grow enough […]