Will we ever end up with just one language? We will lose more languages, but it is very unlikely that we would all end up speaking the same language. There is no way of knowing when language appeared. Humans evolved about 300,000 years ago and they probably started by grunting and gesturing at each other. […]
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What are druids? Druids were members of a priestly class in ancient Celtic cultures. There is not a lot of evidence for druids because they don’t come from a people with a written culture. Most of the records about them were written down by the Roman invaders Gaul and Britain. The Romans suppressed the local
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How does mortar keep the bricks together? It holds the bricks together in a similar way to how glue holds wood together. It also acts as a waterproof sealant. Mortars are not always made of the same material. They are any material that holds together the bricks or stones used to make buildings. Mortars have
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When was the first air conditioning invented? It was invented on July 17th, 1902. The first electrical air conditioning, the predecessor of what we use today, was invented in 1902, but people have been using forms of air conditioning for thousands of years. The first methods to cool buildings relied on architecture. Ancient buildings have
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Why are clouds white? Because the water particles in the clouds scatter light equally. When light comes out of the sun, it is white. That is to say, it emits all of the colors of the color spectrum. The sun emits light as radiation and it emits radiation across almost all of the electromagnetic spectrum,
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What is the difference between a wigwam and a teepee? They have a different shape, are made of a different material, are constructed differently and are used in different regions. The only real similarity is that they are both used by Native Americans as a place to live in. A teepee is a conical tent
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Where do modern military ranks come from? There is not one single point where they started. Many countries have different systems and they have all evolved over time. Most of the ones we use in the West came from Italian and French. You don’t need ranks unless you have an organized army. In the beginning
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How is salt mined? In the same way that any other mineral is mined. There are three ways of producing salt. It can be mined out of the ground, it can be mined as a solution, or it can be left after the water is evaporated away. Salt on Earth is usually found underneath the
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How does a missile shield work? Attacking missiles can be brought down in the boost phase, the midcourse phase, and the terminal phase. Each phase of the missile’s path requires a different method to bring it down. A missile defense shield was first thought about in the Second World War. Germany had invented the V-2
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Why does a cracked whip make a sound? One portion of the whip moves faster than the speed of sound, creating a sonic boom. A sonic boom is created by anything that goes faster than the speed of sound, which is 343 m/s in air. Air behaves in the same way as a fluid, so
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