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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Why can mantis shrimp see so many colors? It turns out that they can’t see more colors than we can. They just process the way they see colors differently. Manis shrimp have twelve to sixteen different types of photoreceptors in their eyes, which lead people to believe that they could see many colors, or shades
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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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What is forensic facial reconstruction? It is the attempt to recreate the face of someone from just their skull. There are several reasons why it might be necessary to try to work out what a person might have looked like from just their skull. One obvious reason is in criminal cases. If an unknown skeleton
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Why do birds need to see ultraviolet light? It helps them with foraging, navigation, and signaling to each other. We can only see combinations of three colors: red, green, and blue. We have cones that detect these colors in our eyes. Most birds can also see ultraviolet light. They have four types of cones in
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Why did America lose the Vietnam War? Because the Vietnamese were experienced, were fighting on home ground, used guerrilla tactics in the jungle, were dedicated, had a lot of foreign support, the Americans employed unpopular tactics, and there was a lack of support for the war in America. Plus many other reasons. The Vietnam War
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What is a spinning jenny? It is a machine that can spin cotton into multiple reels of thread at the same time. It revolutionized the textile industry and is one of the key machines of the Industrial Revolution. There is a story that the inventor, James Hargreaves, named the spinning jenny after his wife Jenny,
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What was the workhouse? It was a place where people who could not support themselves financially could live. They existed from 1388 to 1948. Every country and every city has people that live below the poverty line, for many different reasons. These days, we live in a society where there is some help for these
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What is tea? It is a drink made from pouring hot water over tea leaves, which come from the camellia sinensis shrub. There are many different kinds of tea available today, but most of them are not technically “tea”. It is a commonly held belief that a “tea” is a drink made from pouring hot
