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“The Knowledge Library”
Knowledge for All, without Barriers…
An Initiative by: Kausik Chakraborty.
“The Knowledge Library”
Knowledge for All, without Barriers……….
Knowledge for All, without Barriers…
Snails and slugs are both parts of the same class of creatures called gastropods. Gastropod comes from the Greek words gastros (stomach) and podos (foot). If you’ve ever seen a snail in an aquarium eating as it moves slowly along …
All parts of your body need blood. The movement of blood through your heart and around your body is called circulation. When blood leaves your heart, it moves through tubes called blood vessels. There are three types of blood vessels: arteries, veins, and capillaries. Arteries carry blood away from the heart to other parts of …
It’s the stuff that runs throughout our bodies. We need blood to live, so we want to keep it inside—where it belongs. When we get hurt and it starts coming through the skin, that’s when we have trouble and get …
A popular legend has it that karaoke got its start over two decades ago in Kobe, Japan. No one knows its origins for certain, but many people believe karaoke began when a snack bar owner had trouble with a local …
That popular phrase is used to refer to a situation in which one person’s negative demeanor or bad behavior can affect a whole group of people, influencing them to have a similar negative attitude or to engage in the same bad behavior. The phrase comes from the idea that one rotten apple amongst a bunch of other apples can cause the others to go bad. But is that …
Those doors—known as automatic doors—open and close with the help of technology, not magic. Automatic doors operate with the help of sensors. Sensors do exactly what they sound like they’d do: they sense things. There are many different types of sensors. Most of them sense sound, light, pressure, or motion. …
Female mosquitoes feed on blood. Although we call them “bites,” a female mosquito really doesn’t bite you to get at your blood. Instead, she sticks a part of her mouth through your skin. This part — called the proboscis — is kind of like …
Do you have any idea how many bones you have? Did you realize that the number of bones you have changes from when you’re a baby to when you’re grown up? It’s true! Babies start out with over 300 bones. …
Have you ever celebrated Earth Day? Many people take time each year to honor the planet they call home. On Earth Day, you’ll likely learn about recycling and being “green.” You might also hear the term “carbon footprint.” Your carbon …
Have you ever seen a caterpillar transform into a beautiful butterfly? There are few transformations in nature as miraculous and fascinating as the process of becoming a butterfly. Butterflies go through a life cycle that involves several stages: egg, larva, pupa, and adult. The metamorphosis from a caterpillar into a butterfly occurs during the pupa stage. During this stage, …
Monkeys probably don’t know much about nutrition, but they know they love bananas. Why? It’s probably because bananas tend to grow in the hot, tropical areas where monkeys usually live. They’re a convenient source of food that happens to taste great and provide a lot …
We like to watch dancers on television, too. Over the past several years, dancing shows have gained huge audiences. People can’t seem to get enough of dancing! If you’ve ever watched professionals dancing on television, in a movie, or as …
Have you ever been called a “brain”? If you get good grades, then chances are you probably have. Many people associate the brain with intelligence, which makes sense since that’s where our body stores facts and memories. But your brain is so much more than a …
Silk is a natural protein fiber that can be woven into fabrics. Most silk used for clothing comes from silkworms or moth caterpillars, whose larvae produce silk to form cocoons. Many other types of insects, including spiders, also produce silk. If you’ve ever seen silk up close, you …
Have you ever seen a murmuration? If you have, you would know it. Seeing hundreds — even thousands — of starlings flying together in a whirling, ever-changing pattern is a phenomenon of nature that amazes and delights those lucky enough to witness it. Luckily, a few …
Terracotta is a type of ceramic pottery. It’s used to make many flower pots. Terracotta is also often used for pipes, bricks, and sculptures. Terracotta pottery is made by baking terracotta clay. In fact, the word “terracotta” comes from the Italian words for “baked …
Yes, penguins are aquatic, flightless birds that live in the Southern Hemisphere–especially Antarctica. Unlike the wings of other birds, penguins’ wings are more like flippers that make them well-suited for life in the water. In fact, penguins swimming through water looks quite similar to birds flying through …
If you want to maximize your sunlight during the summer, you might want to head north. WAY up north! How far north? Try the Arctic Circle! During the summer, the sun does not set above the Arctic Circle. In fact, this phenomenon is what helps to …