What are the crown jewels? The crown jewels are a collection of 142 objects, many are used in ceremonies such as the coronation. The Crown Jewels are made up of 13 crowns, 6 swords, 6 sceptres, 16 trumpets, 13 maces, 3 robes, 3 rings, 3 coronets, 2 orbs, 1 spoon and bottle, and lots of […]
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How did the Polynesians navigate? They used star compasses, maps of waves made using sticks, clouds, the color of the sky, and birds. From about 5,000 years ago, groups of people started to spread out from Taiwan into South East Asia. These were the people we call Polynesians. By 1200 AD, they had spread across
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What was the Carrington Event? It was the largest ever geomagnetic storm in recorded history? The Carrington Event lasted from the 1st to the 2nd of September 1859. It was observed by an amateur astronomer called Richard Christopher Carrington; hence its name, and it was caused by a very bright solar flare. From August of
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What causes brain damage? There are several things that cause brain damage. These can be traumatic injury, poison, stroke, tumor, or lack of oxygen. The brain weighs about 1.5 kg on average and contains over 100 billion nerve cells. It uses 20% of the body’s energy, which is more than any other organ. Obviously, without
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How did the Black Death change society? It ended serfdom and slavery, improved worker conditions, brought a recession, harmed religion, increased antisemitism, improved medical practice, improved women’s rights, and changed the world of art and fashion. There were three major plagues, but let’s look at the middle one, the one that is most famous. It
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How did the Black Death spread? It was spread by people along trade routes. The Black Death is another name for bubonic plague, which is caused by a bacteria called Yersinia pestis. Y. pestis generally lives in fleas that feed on rats. When the flea bites the rat, the bacteria passes into the rat’s blood.
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When was shampoo invented? It was invented in India in about 1500. Our hair gets dirty because we secrete an oil called sebum which protects the structure of the hair and stops it from breaking. However, this oil can build up and other things can stick in it, such as dirt. It also has an
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How does a parachute work? A parachute works because of air resistance. If you jump out of an airplane, presuming you are high enough, you are going to accelerate until you reach terminal velocity. Terminal velocity is the maximum speed an object can attain when falling through a fluid. And here is the point that
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How much blood can you lose? Well, obviously all of it. How much blood can you lose and still function? Depending on your body size, from between 15 to 30%. We have approximately 5 liters of blood in our bodies, but that varies by size. An average-sized female of 165 cm will have about 4.3
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Why do we say boycott? The word comes from a British land agent who lived in Ireland. His name was Captain Charles Cunningham Boycott. He was born in England in 1832. He joined the army when his family paid for his commission in 1850. He was not able to join on the strength of his
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