What is snuff? Snuff is a form of powdered tobacco that you can inhale, giving you a quick nicotine hit. Snuff has been around for a long time. Native people living in the area that is now Brazil used powdered tobacco leaves as snuff. They ground the leaves using a rosewood pestle and mortar, which […]
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How does the color of a bird’s wings help it fly? Many birds that soar and glide have wings that are darker on the top than on the bottom because radiated heat helps them to fly. Birds usually have wings that are a different color on the top to that on the bottom. The general
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Why do peacocks have such long tails? A peacock’s tail is so long because it confers a large advantage when trying to find a mate. A peacock’s tail (which is also called a train) is a good example of the balance that means evolution sends a species one way or another. Large tails in peacocks
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Why are many mushrooms dangerous? This is a little bit tricky because not all mushrooms are dangerous, but a lot of them contain toxins that can be harmful or fatal. A lot of plants are also toxic, but they can have edible parts. If you get lost in the wild, the general advice is to
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Why do some fish create their own light? Some fish create their own light to attract prey or, surprisingly, to hide from predators, and many other reasons as well. Being able to create light is called bioluminescence and it is not limited to just fish. The most common organism that creates light on land is
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What is leukemia? Leukemia is a type of cancer that begins in the bone marrow. It is a group of different cancers, rather than one type of cancer. “Leukemia” comes from the Greek words “leukos”, which means white, and “haima”, which means blood. It is named in Greek, but the Greek’s didn’t know what it
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Do larger animals have a faster metabolism? No, bigger animals don’t have a faster metabolism. It tends to be the exact opposite. Let’s look at what metabolism is. The metabolism of an organism refers to all of the chemical processes that go on within the cells to keep that organism alive. There are three main
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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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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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Why do teeth have nerves? We have nerves in our teeth to provide us with feedback on what we are eating and how much pressure we are applying. Teeth appear to have nerves for three reasons. The first reason is because the inside of the tooth is living tissue with a blood supply and where
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