Do guilt and shame have a purpose? Shame and guilt serve to make people function more as a group and to follow the agreed social norms. Many of us spend a large portion of our lives weighed down with shame and guilt and we often wish that they were two emotions we didn’t need to […]
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What is a thorium reactor? A thorium reactor is a nuclear reactor that is powered with thorium and not uranium. Let’s look at how a current nuclear reactor works and then look at how a thorium reactor would work. Nuclear reactors work on the principle of nuclear fission. This is where an atom of a
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Why are the White Cliffs of Dover white? The White Cliffs of Dover are white because they are made of white chalk, which is a type of limestone. The White Cliffs of Dover are a very famous symbol of the UK. During the Second World War they were often sung about because when pilots crossed
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How do weight loss drugs work? There are different kinds of weight loss drugs, but the most common ones work by suppressing appetite and slowing down how fast the stomach is emptied. A large percentage of people in developed countries are becoming seriously obese. There are many reasons for this. The prevalence of ultra-processed food
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How does a CT scan work? A CT scan uses x-rays and computer software to produce a 2D or a 3D image of the section of the body being scanned. CT stands for Computed Tomography. “Computed” means calculated, or worked out. “Tomography” is “imaging by sections using any kind of penetrating wave”. Tomography is made
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When did we start using taxis? The first taxi service was started in London, UK in 1605. Just as with buses, it took several changes in society before a taxi service became necessary or possible. Before we look at that, though, let’s look at the origin of the word “taxi”. Taxi is a shortened form
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How do ultramassive black holes form? Ultramassive black holes can form when supermassive black holes collide. To make a supermassive black hole, we need to start with a regular black hole. Black holes can form when a very large star collapses in on itself. The star has to be very large, at least 25 times
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What causes a fire tornado? A fire tornado is caused when the intense heat from the fire rapidly warms the air above the ground and makes it rise in a spiral. Fire tornadoes are fairly common, but it is very uncommon for someone to see them because you would need to be in the middle
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Why can you graft onto a plant? You can graft onto a plant because they don’t have an immune system. There are several ways of grafting plants, but the method I am thinking about is called cleft grafting. In cleft grafting, a cleft is cut into the trunk of a tree of the stalk of
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How do you get a star in Hollywood? You have to be nominated, have been in the business for over five years, and someone has to pay $75,000 on your behalf, along with a few other requirements as well. There are currently 2,790 stars in Hollywood. This increases by 30 every year. They can’t all
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