Is a force field possible? In theory, there are several possibilities, such as warping space time, electric fields, directional lasers, a controllable plasma, a magnetic field, and others. We have all seen science fiction movies where a spaceship is protected by a forcefield that destroys enemy fire when it comes into contact. The recent movie […]
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There are many reasons why bees swarm out of a hive. It could be climate change, disease, disturbances, lack of resources, or many other things. There are many different species of bees and many different types of colonies, but an average bee colony has about 50,000 worker bees, 100 drones, one queen, and lots of
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When was the first department store? It was most probably Harding, Howell & Co’s Grand Fashionable Magazine, which opened in 1796 in London. The first department store came about with the growing Industrial Revolution. Before then, rural towns would have a general store and maybe a market. Cities would have general stores and probably markets,
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Why do we have capital letters? Because the majority of the letters in the alphabet we use came from Latin. This question is actually the wrong way round. It should be asking why we have lowercase letters. The majority of our writing these days is done in lowercase with the occasional capital letter thrown in,
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What is the pH scale? It probably stands for potential of hydrogen and it shows how much hydrogen is in a substance. The pH scale is written with a capital H because the symbols for the elements are always written with a capital. However, when the scale was invented by a Danish chemist called Soren
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Why are bridges designed to move? Because they expand and contract, because the wind moves them, and because the land on either side of them moves. When you drive on and off a bridge, you may have noticed there is a slight gap at either end. This gap usually has a metal bracket on it
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Why do we sneeze? We usually sneeze in order to remove an irritant from the nose. There are many different things that make people sneeze, but the most common cause is when there is an irritant in the nose. This could be smoke particles, it could be dust, it could be anything. The nose is
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Why do many Americans drink coffee and many British people drink tea? Because Americans boycotted tea before, during, and after the War of Independence and because the British government gained more money from taxing tea. The two countries both started as polar opposites and have ended up as polar opposites. Tea was more popular than
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Why does iron rust? The iron atoms react with oxygen molecules to produce iron oxide, which is rust. Other metals don’t rust because only iron, or metals with an iron alloy can rust. This is because rust is iron oxide. Other metals can react with oxygen in different ways or corrode, but only iron can
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Is a starfish a fish? No, starfish are not fish. Fish are vertebrate animals that live in the sea, have gills to breathe through, have a two chambered heart, are cold blooded, and have a brain and central nervous system. Starfish live in the sea, but that is where the similarity stops. These days, many
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