When was the compass invented? The compass was invented in China in the 4th century BC. However, it wasn’t used for navigation until over a thousand years later, also in China. A compass works because our planet has a magnetic field. The magnetic field is generated by the spinning ball of iron at the center […]
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How can carbon be captured? There are many ways carbon can be captured when it is produced and then stored. However, it is much easier to stop carbon at source than it is to take carbon out of the atmosphere once it is already there. Let’s look at some methods to stop the carbon before
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What is the IoT? The IoT is the Internet of Things, and it refers to all of the physical objects that are connected to the Internet. The term Internet of Things was coined in 1999 by a computer scientist called Kevin Ashton. He had been tasked by Proctor & Gamble to come up with a
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When was the first postal service? There have been postal services for thousands of years, but they took on a very different form to the modern postal service. The concept behind the modern postal service started in the 19th century. Since people have been able to write, there has been a need to send and
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How does YouTube learn what I want to watch? YouTube basically knows what types of videos you watch and how long you watch them. It has a lot of other information as well, but it does its best to match new videos with the type of video you are always watching. All social network sites
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How is nanotechnology used in medicine? Currently, nanotechnology is used to deliver drugs, improve diagnostics, and help regenerate after illness or surgery. Modern technology is still limited, and the future of nanotechnology could bring an amazing revolution in medicine. Let’s look at what nanotechnology is, how it is currently used, and how it could be
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How does Wi-Fi work? Wi-Fi transmits information from a router to your device and vice versa using radio waves, which is why you can use it without a cable. I always thought Wi-Fi stood for “wireless fiber”, but apparently, it doesn’t actually stand for anything, and is just a brand name. The technology behind Wi-Fi
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When did people start playing board games? The first board games were played in Egypt roughly 5,500 years ago. We have probably all played board games at some time in our lives. Christmas isn’t really Christmas without a game of Pictionary or Monopoly. Incidentally, Monopoly is considered the best-selling board game of all time, but
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Why was Genghis Khan so effective? Genghis Khan was effective because of his military strategy, but also because he could take advantage of the natural abilities of the Mongols he commanded and of the weaknesses of the enemies he faced. Genghis Khan was born in 1162. His birth name was Temūjin, and he was the
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Why do churches have stained glass windows? The stained glass windows in churches were used to display religious stories to educate the congregation. They were also used because plate glass windows were not possible at such a large scale. And they were possibly used to show off the wealth and the power of the church.
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