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 – 1331 : Stealth Technology
Episode – 1331 : Stealth Technology Podcast Transcript The history of warfare has been a history of measures and countermeasures. When the airplane was invented, RADAR was later invented as […]
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 […]
Episode – 1231 : The Element Mercury
Episode – 1231 : The Element Mercury Podcast Transcript Since the dawn of human history, humans have been aware of a seemingly miraculous substance. It was a substance that had […]
Episode – 1228 : Parachutes
Episode – 1228 : Parachutes Podcast Transcript Centuries ago, someone decided jumping from a great height and trying to land without being injured would be a good idea. …and in […]
Episode – 1224 : Eponymous Laws: Part 2
Episode – 1224 : Eponymous Laws: Part 2 Podcast Transcript In a previous episode, I went through a list of eponymous laws. These were laws, general rules, or sometimes even […]
Episode – 1218 : A Brief History of Digital Audio
Episode – 1218 : A Brief History of Digital Audio Podcast Transcript Right now, you are listening to the sound of my voice on some sort of digital audio device. […]
Episode – 1209 : What is Calculus?
Episode – 1209 : What is Calculus? Podcast Transcript As early as 2400 years ago, Greek philosophers were coming up with paradoxes that seemingly had no solution. Early mathematicians came […]
Episode – 1205 : A Brief History of Microscopy
Episode – 1205 : A Brief History of Microscopy Podcast Transcript Ever since humans could see, we’ve been able to look up at the night sky and see things lightyears […]