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What causes an epileptic seizure?
Photo by MART PRODUCTION: https://www.pexels.com/photo/technology-computer-head-health-7089020/ What causes an epileptic seizure? It is caused by abnormal electrical activity in the brain. There is not one reason why people have epilepsy and there is not one type of seizure. Epileptics can suffer from focal seizures and generalized seizures. As their names suggest, focal seizures are focused…
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What is a metal?
Photo by Pixabay: https://www.pexels.com/photo/black-and-gold-machine-60064/ What is a metal? A metal is any material that readily loses its outer shell electrons, can be polished to be highly reflective of light, is opaque, conducts heat, conducts electricity, is ductile, and malleable. The bond between the atoms in the molecules cause all of these properties and are what makes a material a…
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What is a limited company and a shell company?
Photo by Expect Best: https://www.pexels.com/photo/buildings-with-glass-windows-351264/ What is a limited company and a shell company? A limited company is one where the risk is limited to the money the company has. A shell company is a company without any business operations or assets. I’m going to use the word company here, but there are some differences between company and corporation. The…
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Johannes Gutenberg – inventor of the printing press
Image By Daniel Nikolaus Chodowiecki – DANIEL CHODOWIECKI 62 bisher unveröffentlichte Handzeichnungen zu dem Elementarwerk von Johann Bernhard Basedow. Mit einem Vorworte von Max von Boehn. Voigtländer-Tetzner, Frankfurt am Main 1922. (self scanned from book), Public Domain, https://commons.wikimedia.org/w/index.php?curid=17927966 In the 1440s, Johannes Gutenberg invented the printing press and…
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What will happen to the Voyager spacecraft?
Image By Don Davis – Donald Davis' official site, Public Domain, https://commons.wikimedia.org/w/index.php?curid=1684410 What will happen to the Voyager spacecraft? Unless they collide with anything, they will probably keep going for several billion years. Voyager 1 is currently 24.3 billion km away from Earth and Voyager 2 is 20.3 billion km away. Despite being called number 2, Voyager 2…
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Is moss one plant or many plants?
Photo by Daniel B: https://www.pexels.com/photo/photo-of-trees-covered-in-moss-141233/ Is moss one plant or many plants? A patch of moss is made up of many moss plants. There are many types of moss. There are approximately 20,000 species of moss plants and some of them are huge. The Dawsonia moss grows up to 50 cm tall. However, most moss plants are much smaller than that. Mosses have been…
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What is the difference between a slave and a serf?
Image By anonymous (Queen Mary Master) – this file: scan dated 2009, uploaded (without identification of the source) 12 May 2010 by Ann Scott (medievalminds.comReeve-and-Serfs.original1.jpg), Public Domain, https://commons.wikimedia.org/w/index.php?curid=16340916 What is the difference between a slave and a serf? A slave is the property of the person who owns them while a serf is bound to the…
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Why do we hiccup?
Image By In source box put https://www.scientificanimations.com – In source box put https://www.scientificanimations.com/wiki-images, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=86584916 Why do we hiccup? Hiccups are caused by muscular twitches in the diaphragm. The diaphragm is the muscle that we use to breathe. It is a dome shaped muscle that is below the lungs. It is…
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Why does hair turn white?
Photo by cottonbro studio: https://www.pexels.com/photo/elderly-couple-smiling-together-7236499/ Why does hair turn white? The pigment cells in the hair follicles die. Our hair is colored by melanin that is produced by the pigment cells in each hair follicle. Melanin is what colors our skin as well. Melanin is produced in cells called melanocytes and different quantities or types of melanin can…
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Why does the medical symbol have a snake and a staff on it?
Photo by Antonio Batinić: https://www.pexels.com/photo/ambulances-on-a-parking-lot-5364345/ Why does the medical symbol have a snake and a staff on it? It is the Rod of Asclepius, an ancient symbol of medicine. If you have the misfortune to require an ambulance in the US, you will notice that it a) costs an awful lot, and b) has a six pointed blue star with a white staff and snake in the middle…
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Why are there many different types of screw head?
Why are there many different types of screw head?
Photo by ready made: https://www.pexels.com/photo/bunch-of-various-metal-screws-with-plastic-dowels-placed-on-white-table-3926803/ Why are there many different types of screw head? The different types of screw head allow for different amounts of torque and for use by different machines. There are over 30 different types of screw head. Prehistoric people generally joined things together using…
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How does LiDAR help archaeologists?
How does LiDAR help archaeologists?
today.Image By U.S. National Park Service, U.S. Geological Survey – http://eros.usgs.gov/lir/midwest-archeological-center, Public Domain, https://commons.wikimedia.org/w/index.php?curid=37307642 How does LiDAR help archaeologists? It can map the ground down to the millimeter, allowing archaeologists to find the remains of cities and graves that might otherwise remain hidden. LiDAR stands for…
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Why do mustard and wasabi make your nose hurt?
Why do mustard and wasabi make your nose hurt?
Photo by FOX: https://www.pexels.com/photo/sushi-on-stainless-steel-tray-in-close-up-photography-11444807/ Why do mustard and wasabi make your nose hurt? Mustard and wasabi hurt your nose instead of your tongue and throat because the oil in them turns into a gas. Spices such as mustard and wasabi affect us in a very different way to chili. When you eat a spicy chili, the capsaicin in the pepper…
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Why are sunsets such beautiful colors?
Why are sunsets such beautiful colors?
Photo by meo: https://www.pexels.com/photo/golden-hour-420885/ Why are sunsets such beautiful colors? The beautiful colors of sunrises and sunsets are caused because light rays are scattered by particles in the sky. Light has different wavelengths and our eyes have evolved to detect these wavelengths, which is how we can see colors. Our eyes have a light-sensitive area which is sensitive to…
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#371 Why do we get headaches?
#371 Why do we get headaches?
Photo by Towfiqu barbhuiya: https://www.pexels.com/photo/man-in-blue-long-sleeves-having-a-headache-9843268/ Why do we get headaches? There are many theories, but nobody actually knows. There are 200 different types of headaches, but they are divided up into primary and secondary headaches. Primary headaches are headaches that aren’t caused by a disease or damage to the brain. Secondary…
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#370 How does a rocket engine work?
#370 How does a rocket engine work?
Photo by Pixabay: https://www.pexels.com/photo/space-rocket-launching-73871/ How does a rocket engine work? Rocket engines work because of Newton’s third law of motion. Newton’s third law of motion states “to every action there is always opposed an equal reaction; or, the mutual actions of two bodies upon each other are always equal, and directed to contrary parts.” Or, in other words, for…
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#369 What makes us itch?
#369 What makes us itch?
Photo by FOX: https://www.pexels.com/photo/brown-tabby-cat-scratching-head-1265613/ What makes us itch? Itching is caused by the release of the chemical histamine. There are different types of itch. Almost all animals have an itch and scratch response. Bears scratch themselves on trees and dolphins scratch themselves on rocks, or at the bottom of their tank if they are in captivity. It is an…
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