Why do some plants have thorns? Plants generally have thorns to deter herbivores and insects from eating them. Plants usually have parts that they want to be eaten (the fruit, for example) and parts that they don’t want to be eaten (the stem and leaves). Plants have different methods of scattering their seeds. Some do […]
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When were the first colored cars? The first real colored cars became available in the 1920s, but before that, there was a choice of a few colors, although they had to be custom painted. When we go to buy a car these days, after we choose from the thousands of available models available, we then
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What was the Texas Revolution? It was a fight by Texas for independence from Mexico. It led to the Republic of Texas, which didn’t last long before it was absorbed into the growing United States of America. Texas is the second largest state in the United States, coming after Alaska. It is roughly 40% the
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What is a steppe? A steppe is a dry, grassy plain that is found in a temperate climate. It is one of the many biomes on Earth. The word “steppe” comes from the Russian word “step” (степь), which means low lying land. It came into English through German. In Russian, it us pronounced stjepj, and
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Why is Jakarta sinking? Jakarta is sinking by as much as 30 cm a year in some places, and the cause is overextraction of groundwater. Jakarta is the capital city of Indonesia, and home to 11.3 million people, which is roughly 4% of all Indonesians. It is on the northwest coast of Java and is
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Why is the moon covered in dust? The fine layer of dust that the moon is covered with is called lunar regolith and it has been made by meteoroids and the solar wind. If you look at videos of the moon landings, the astronauts jump around, and every time they impact the surface of the
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Who is the richest person ever? This is an incredibly difficult question because society and economics were vastly different in the past. Still, Mansa Musa is often said to be the richest person who ever lived. The richest person today is Elon Musk, although his wealth fluctuates wildly. At its peak, he was worth $425
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How many layers does the Earth have? At its simplest, the Earth has four layers. These are the crust, the mantle, the outer core, and the inner core. However, these layers can be divided up into smaller layers as well, depending on how you define a layer. The crust is the rocky outer layer that
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Why do bees buzz? Bees buzz because of the speed with which they beat their wings. All insects with wings make a sound, but some of them are too high pitched for us to be able to hear it. Sound is made by something vibrating and passing that vibration on to the molecules near to
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Can alcohol keep you warm? No, alcohol can’t keep you warm. It might make you feel warm for a short period of time, but it will actually make you lose heat in the long term. There is often a scene in a movie where someone comes in from the cold and has a quick shot
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