From submariners who live on an 18-hour day to the railway clerk who fought to standardise time zones, Steven Johnson discovers the surprising journey of time in our lives. Show more

For at least 100,000 years, humans have been able to make fire, but the skill to make cold is a modern technique. Steven Johnson traces the unsung heroes of this technology. Show more

Documentary series. A look at the unsung heroes who allowed us to transport our voices over long distances - one of the greatest transformations in how we live our lives. Show more

Documentary series. Steven Johnson discovers the unsung heroes of invention in the surprising journey from the candle to the neon lights of Las Vegas and the world of lasers. Show more

In the Rockies, Richard Fortey explores a fossilised seabed containing bizarre life forms that have revolutionised understanding about the beginnings of complex life. Show more

Professor Richard Fortey visits China to see a fossil site that has yielded remains of feathered dinosaurs and rewritten the story of the origin of birds. Show more

Professor Richard Fortey investigates the remains of an ancient volcanic lake in Germany where fossils of early mammals and giant insects have been found. Show more

From the clean environment of a microchip factory to the engineer who lifted a city to install sewers, Steven Johnson traces the journey from dirty to clean in our lives. Show more