Why was the abacus invented? It was invented because merchants needed to keep an inventory, trade was taking off, and the powers that be wanted their tax.. The English word abacus came from the Latin word abax, which came from the Greek word abax, which meant table or tablet. It could have come from an […]
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How does a telescope work? They used to use lenses, but modern telescopes use mirrors. The first telescopes used lenses in the same way that a camera or a magnifying glass does. The first telescope was made by Hans Lipperhey, a German-Dutch spectacle maker. He used lenses to make glasses and he knew that concave
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Why doesn’t the Autobahn have a speed limit? The Autobahn didn’t have a speed limit when they were introduced in Germany and it was left without one. Trying to apply a speed limit later on was met with a lot of resistance. Germany is the only country in the world that has roads without speed
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Why are Omega-3 fatty acids good for us? They are healthy fats that are supposed to support heart health, lower triglycerides, improve blood vessels, aid the immune system, and do good things in the brain. What are Omega-3 fatty acids? They are not just one fat. There are 11 different types altogether. When we are
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Is modern art still modern? It technically applies to the period that lasted from the 1860s to the 1970s, so modern art is not modern art anymore, if that makes any sense. Postmodern art came after it and right now, we are living in the post-modern contemporary art era. We have an image of modern
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What is baking soda? Baking soda is sodium bicarbonate, which is a salt. Baking soda has a myriad of uses, but it was first used for baking, hence its name. It was discovered in 1801 in Berlin, by a pharmacist called Valentin Rose the Younger. I don’t know when it was first used in baking,
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Why can animals jump higher and farther than us? They have more muscles, more elastic joints, tails, more speed, and they can impart more power into the ground. Note, I am going to look at mammals, not insects, which can jump many times their own body length. The highest a human can jump is 2.45
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Why does champagne have bubbles but wine doesn’t? Champagne goes through a second fermentation that wine doesn’t. Champagne has bubbles because of the way it is made. Regular wine would have bubbles if it was made in the same way, as can be seen by looking at sparkling wine. The only difference between champagne and
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What is a blood diamond? They are diamonds that are mined in a war zone and used to finance the war. They are called “blood diamonds” because of all the blood that is spilled getting them and all the blood that is spilled from the profits of selling them. They are also called conflict diamonds.
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When does a seed start growing? The vast majority of seeds start growing when they are exposed to enough water, which activates hormones inside them. Some seeds need sunlight or other things, but water is by far the biggest trigger. Seeds can be a very efficient way for a plant to spread its DNA over
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