Imagine you want to tell your friend, “I’ll be home late.” Today, you would probably pick up your phone, open a messaging app and send the message in a few seconds. But what if you lived 100 years ago? There was no WhatsApp, no SMS, no email and, in most places, no mobile phone. Even … Read more
Today, getting directions is almost effortless. Open Google Maps, enter a destination, and your phone can tell you exactly where you are and which way to go. But imagine being in the middle of the ocean, hundreds of kilometers from land, with no roads, no mobile network, no satellites, and no GPS. How did sailors … Read more
How was ice made before refrigeration? Today, making ice is almost ridiculously easy. Fill an ice tray with water, put it in the freezer, and a few hours later you have ice. But what if you lived 500 years ago? Or 1,000 years ago? What if there was no refrigerator, no freezer, no electricity—and you … Read more
How did people tell time before clocks, watches, and smartphones existed? For thousands of years, people had no way to check whether it was exactly 10:30 in the morning or 6:45 in the evening. Instead, they learned to measure time by observing the Sun, shadows, water, fire, sand, and stars. They noticed that the world … Read more
