Why did armies use brightly colored uniforms? Armies used to use brightly colored uniforms so that the commanders could easily see their troops, prevent friendly fire, project national pride, instill fear in the enemy, and help to direct a battle. This stopped with the development of modern conventional weapons and tactics. Warriors have worn one […]
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What was miasma theory? Miasma theory was the idea that diseases such as cholera and the plague were caused by a noxious form of bad air called miasma, which is the ancient Greek word for pollution. Miasma as a theory lasted for over two thousand five hundred years and only disappeared when microorganisms were discovered
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How did people first discover Ice Ages? The first scientific theory of ice ages was proposed by Louis Agassiz in 1837. However, people had theorized about them for several hundreds of years before that. Earth has been through five ice ages so far. At least as far as we know. There may have been
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What happened to the Franklin expedition? All 129 crew members and officers died when their ships were trapped in ice just off King William Island, which is north of Canada. The Franklin expedition was commanded by Sir John Franklin. He was a British naval officer, an explorer, and a colonial administrator. He had led several
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How was the City of Ur lost and then found again? Ur was lost because of political collapse, terrible invasions, and environmental changes. There was a suspected ancient city known about at the site for hundreds of years, but it was finally excavated and identified at the end of the 19th century. The City of
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Why does roulette have a 0? A roulette wheel has a 0 to increase the odds that you will lose and the house will win. A European roulette wheel and an American roulette wheel are slightly different. They both have numbers from 1 to 36, but a European wheel only has 0, while an American
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What will happen to the Milky Way in 1 trillion years time? Some or perhaps most of the galaxies in the Local Group may have merged by then, although it is no longer certain that even the Milky Way and Andromeda will merge. No stars outside of that galaxy would be visible to any beings
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What was debtors’ prison? A debtors’ prison was, as the name suggests, a prison for people who were unable to pay their debts. The majority of the world runs on the system of debt. People borrow money to pay for things they can’t afford at the time. Mortgages for houses and credit card for other
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How were black holes discovered? Black holes were theorized long before they were actually detected or seen. The first theory of a black hole was presented by John Michell in 1783. Black holes were first theorized shortly after Newton introduced his laws of gravity. It was a natural progression from these theories. Newton had proposed
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When was the first hearing aid? The first hearing aid was an ear trumpet described in 1624 by a French priest and mathematician called Jean Leurechon. These days, people with hearing loss can buy pretty advanced hearing aids that have different settings depending on the situation. They can be directional or they can cut out
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