What causes an ice cream headache? It is caused when something cold touches the roof of the mouth and makes the blood vessels constrict. It turns out that no one knows for definite what causes an ice cream headache. Many of us have experienced one and it is also called brain freeze. Its official name […]
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Why do snails have teeth? They use their teeth to scrape away pieces of food. Snails are not the only gastropods that have teeth. Slugs basically evolved from snails and they have teeth as well. Both slugs and snails have thousands of microscopic teeth. Depending on the size of the snail, they can have over
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Why do male seahorses give birth? Male seahorses give birth because it gives the female time to make more eggs. All living organisms have to reproduce in order to keep their DNA going. However, they don’t all reproduce in the same way. There are two types of reproduction: sexual and asexual. There is only one
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What is a cavity? It is a hole in the enamel of the tooth that bacteria can get in through. We have 32 teeth, assuming you haven’t had your wisdom teeth out, and they are divided into three different types of teeth. We have incisors, canines, and molars. Incisors are the cutting teeth. The name
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Why did we lose all our fur? There are several hypotheses, but probably so that we could cool down more easily. However, nobody knows the actual reason why we lost our fur and there is no way of knowing when we lost it, as well. We are the only hairless ape, but we are obviously
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Why do flies buzz and cicadas and crickets chirp? Flies buzz because of how fast their wings have to move, cicadas chirp by flexing their tymbal, and crickets rub their wings together. Flies aren’t the only insects that buzz. The majority of insects produce some kind of buzzing sound when they fly. Some insects produce
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How can hippos sleep underwater? They have a reflex that makes them bob up and down in the water while they are asleep so that they can breathe. Hippos are the third largest land animals. They are only beaten by white rhinos and elephants. Hippos grow up to 5 m long, including their tails, and
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Why do shoes smell? Shoes smell because bacteria break down the sweat and dead skin cells from our feet, producing waste products that smell bad. Bacteria live all over our skin, not just on our feet. These bacteria are called the skin microbiota. You may have heard of the gut microbiota, which is the name
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How can sunflowers clean up radiation? They take the radioactive isotopes out of the soil and combine them into their stems and flowers. There is radiation all around us, all of the time. Radiation is simply energy that moves from one place to another. The light energy that bounces of a rose and hits our
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Why is a duck-billed platypus so odd? It has a beak, no teeth, lays eggs, sweats milk, has 10 sex chromosomes, has webbed feet, has fur that glows, they have no stomachs, and has venomous spurs. The duck-billed platypus is native to Australia. Its name comes from Greek and means “flat foot”. It is so
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