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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…
There are three types of tears: emotional (crying or weeping), basal tears, and reflexive tears. Humans cry emotional tears as a response to emotional stress, suffering, mourning, and physical pain. Unless you are having an extremely bad day, the tears …
Believe it or not, you can grow your fingernails to be really, really long. How long? According to the Guinness World Records website, the current world record holder for longest fingernails is Christine “The Dutchess” Walton from Las Vegas, Nevada. The …
Blood is composed of cells and plasma. The cells include red blood cells, white blood cells, and platelets. The red blood cells carry oxygen from the lungs and give blood its red color. The white blood cells fight infections. The platelets help form clots to stop bleeding in …
In the United States, yogurt is usually made with cow’s milk. In other parts of the world, however, milk from other animals might be used, including sheep, goats, and camels. Yogurt is made by adding certain bacteria to milk in a carefully-controlled environment and allowing it to ferment. The fermentation process gives yogurt its consistency and tangy flavor. For example, the bacteria used …
Each of the colors is made up of its own wavelengths, kind of like a unique fingerprint. Red has the longest wavelength, violet has the shortest and all the other colors are somewhere in the middle. When you look at an object, such as a …
If you’ve ever owned a dog or a cat, you know very well that animals can communicate. They understand the basic commands that you give them. Most pets fully understand what you mean when you say the word “treat.” Likewise, …
Your body breaks down the food you eat to get the nutrients and energy it needs in a process called digestion. The parts of your body involved in digestion make up your digestive system. While you may know that the stomach plays …
Although it seems to change colors, the Moon itself stays the same color year-round. The different colors we see from time to time are the result of our particular viewing angle, along with the composition of Earth’s atmosphere. It takes …
There are a few reasons why a rainy day might make you sleepy. One is the lack of sunlight. When the human body is exposed to the Sun, it releases less melatonin and more serotonin. This makes people feel more alert and cheerful. The lack of …
The IQ test got its start in the early 20th century when French psychologist Alfred Binet was asked by the French government to develop a means to identify students who would need extra help in school. With help from Theodore Simon, Binet developed the first intelligence test, known …
Bats are happy to sleep upside-down in a variety of places. The movies portray bats as cave dwellers, but you’ll find them hanging out upside-down everywhere from attics to bridges to the insides of hollow trees. Bats roost, or perch, upside-down for several reasons. Unlike birds, bats cannot launch their bodies …
Earth is just one of four rocky planets in our solar system. The others are Mercury, Venus, and Mars. The remaining planets — Jupiter, Saturn, Uranus, and Neptune — are made mostly of gas. Many of Earth’s rocks are covered …
Bluetooth is a global wireless communication technology originally invented by engineers at Swedish company Ericsson in 1994. Today, no single company owns Bluetooth technology. Instead, a group of companies called the Bluetooth Special Interest Group to work together to advance …
Carpenter bees are tied with bumblebee queens as the largest bees in North America. They live up to three years and can grow to be one inch long. Some experts call them “gentle giants” because, despite their size, they rarely harm people. …
Cacti are native to the Americas and can be found from the southern tip of South America to western Canada in North America. They usually live in areas that are relatively dry. Many cacti thrive in areas that are extremely dry, such …
A person’s skin color is determined by the amount of melanin in his or her skin. Melanin is a dark brown to black pigment produced by special cells called melanocytes. Melanin’s purpose is to protect the skin from the Sun’s harmful UV rays. Ultraviolet radiation can cause skin cancer. Melanin acts as a natural sunscreen by absorbing these …
If you’re having trouble waking up your brain and getting going, there are several things you can do that don’t involve drinking massive amounts of caffeine. Here are a few ideas to help you wake up refreshed and energized: As soon as you …
Coughing is actually a good thing. It shows that your body is working hard to protect you. Coughing is the body’s natural way of clearing your breathing passages of unwanted or dangerous irritants. Although everyone knows what coughing is, scientists define the …