What is a failed state? It is a state that can no longer control its own security and does not have control over its territory, borders, economy, and people. The expression “failed state” hasn’t been used since 2014 because it has the nuance that a state cannot be saved. The correct expression is “Fragile State”. […]
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What is asbestos? Asbestos is a material made of lots of mineral fibers. It can be woven into shapes and it is fire-resistant. Asbestos is a natural mineral that is mined and then processed. There are six different types of asbestos, and they are divided into two categories: amphibole and serpentine. The fibers in the
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How does autofocus work? Active autofocus works by calculating the distance to the object and passive autofocus works by using contrast sensors to analyze the image. How does a camera focus? Cameras focus in the same way that our eyes do. Light waves are reflected off objects and they enter our eyes or a camera.
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How do polar bears find enough food? By having an exceptional sense of smell, a lot of patience, and a very efficient digestion. Polar bears are the largest bear species by far. An adult male can weigh close to 800 kg, and they are about 160 cm at the shoulder. When they stand up and
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How deep is the desert? Depending on the desert, the sand is between 1 m and 43 m deep. Although, if you count to the top of the largest sand dunes, they could be several hundred meters deep. Also, if we are talking about deserts and not just sandy deserts, the ice on Antarctica is
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When did people start using passports? The idea for the modern passport was introduced by the League of Nations in 1920, shortly after the end of World War 1. It was basically a way to control immigration. The idea behind the passport has existed since the very first nation states. A passport was a document
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Where did stoicism come from? It was invented in Athens in 300 BC, by Zeno of Citium (modern day Cyprus). Stoicism is a philosophy that seems to enjoying a revival these days. You see lots of videos of people on Instagram and YouTube who espouse the stoic lifestyle. So, what exactly is stoicism? Stoics believe
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Was Robin Hood real? Probably not, but the legend could have been based on a real person. Robin Hood has been made famous by the many movies that have been made about him. His story is legendary. In all of the modern stories, he is a lord and while he is away fighting in the
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How many countries are nuclear powers? There are 9 countries that have nuclear weapons. They are the United States, Russia, China, France, the United Kingdom, Pakistan, India, Israel, and North Korea. Between them, they have a grand total of 13,000 nuclear weapons. One nuclear weapon can destroy a city. If all 13,000 of those nuclear
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How does anthrax kill? Anthrax is an infection caused by a bacterium called Bacillus anthracis. Because it is a bacterial infection, it can be treated with antibiotics if it is discovered soon enough. We may have heard about anthrax from the news, but it is a naturally occurring bacteria that has been around for a
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