Knowledge for All, without Barriers…
In ancient times, people often used a twig or a small piece of a tree branch — called a chew stick or a tooth stick
Black cats have been associated with bad luck and evil for hundreds of years. But why? How exactly did a cuddly little kitty cat get
1. Dog’s EAR….while reading a book when we get up we fold the corner of the page we were reading. That is known as Dog’s
Humans aren’t the only animals that laugh. It just so happens that there are a few other species who express jovial sounds, although some only sound as
The French emperor Napoleon III challenged the scientists of his day to invent a cheaper alternative to butter that would still be similar in appearance
The answer is a matter of simple science. Popcorn is a special kind of corn. Of all the types of corn, popcorn is the only variety that
On Earth, one solar year is usually 365 days. This is the amount of time that it takes Earth to travel once around the Sun. When the Gregorian calendar was introduced in 1582,
Have you ever seen a Venus flytrap? If so, you may already know that its name is rather fitting. It certainly looks like a plant
Scientists will tell you that corals are indeed invertebrate animals. They belong to the colorful group of animals known as Cnidaria, which also includes jellyfish
It’s true! Generally, humans can see light with wavelengths between 380 and 700 nanometers (nm). All the colors of the rainbow—from red down to violet—fall
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,
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
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
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
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
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,
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
Your brain is divided into two halves called hemispheres. Many people believe that these different sides of the brain — the left and the right —
Antimatter costs $62.5 trillion per gram! What is antimatter? You’re not the first person to ask! In fact, people weren’t even sure antimatter existed for a
Do you know where pearls come from? They don’t grow on trees. You can’t plant them. They aren’t mined out of the ground either. So
How Many is a Googol? What’s the biggest number you can think of? A million? A billion? A trillion? A gazillion? Infinity? Long ago, mathematicians came
If you’re a white chocolate fan, you probably don’t care much whether it’s really chocolate or not. As long as it keeps tasting great in
If you’ve ever paid much attention to a keyboard — either on your computer or even on other types of electronic devices, such as smartphones — you’ve probably noticed
The seashells in shops by the seashore can be beautiful. They come in all sorts of shapes, sizes, and colors. There almost seems to be
The Eiffel Tower was designed by engineer Gustave Eiffel to be the focal point and entrance arch for the World’s Fair celebrating the 100th anniversary
Typoglycemia Typoglycemia is a neologism given to a purported recent discovery about the cognitive processes behind reading written text. The legend, propagated by email and message boards, purportedly demonstrates that
Strawberries are the only fruit that wears their seeds on the outside. The average berry is adorned with some 200 of them. No wonder it
That honor goes to the super-speedy peregrine falcon. Peregrine falcons are one of the most common birds of prey around the world. They can be found
Is it magic? Nope! It’s science — and it’s all about water. The regular white glue most students know so well is made up of a variety
Why do things have to die? What a great question that has been asked by many of our Wonder Friends. In fact, it’s a question that
Despite its name, the French fry is not French. The origins of the French fry have been traced back to Belgium, where historians claim potatoes were being fried
Coffee has been brewed as a drink for hundreds of years. Today, it’s one of the most popular drinks in the world. A visit to
When winter rolls around, you don’t have to store up plenty of food to eat when it’s cold outside. You just keep going to the store when you need more food.
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
To understand humidity, you first have to realize that there’s water in the air all around you. “But I’m not wet!” you might say. That’s true. Most
Hundreds of years ago, people believed Earth was flat and that the Sun traveled around Earth. We now know different, but were those views really
The adults in your life probably tell you regularly how important sleep is. Most children would prefer to stay up as late as possible, though. It’s
Have you ever seen a catfish? If so, you might already know where its name came from. Long, thin tendrils protrude from around their mouths. These look
Have you ever WONDERed what the fastest car in the world is? Before we look at a couple of the contenders, we should make clear
Sneezing — also called “sternutation” — is your body’s natural, reflexive way of getting rid of something irritating inside your nose. All sorts of things,
Humans might never grow gills. However, they may be able to live underwater without them. Technology makes new things possible each day. People already drive
In 1666, the famous scientist Isaac Newton discovered that if sunlight passed through a triangular piece of glass called a prism, the white light would split into a band of colors.
The pangolin is sometimes known as the “scaly anteater.” Some people also call it a pinecone with legs or an artichoke with a tail. However you describe it, the
Cloning. The word itself probably conjures images from a science fiction movie, in which an evil genius creates clones of himself. With an army of
The hippo is also known by its full name (hippopotamus) or its scientific name (Hippopotamus amphibius). Its name comes from the ancient Greek words for
This process of converting water and carbon dioxide into oxygen and glucose is called photosynthesis. A chemical called chlorophyll helps the process of photosynthesis occur. Chlorophyll is also what gives plants their green color. As summer ends and autumn begins, the
What about all those animals that call the Arctic home? It’s cold there pretty much the whole year, and during winter it gets especially cold. How do those
Dynamite was invented in 1867 by Alfred Nobel. If you’re wondering, yes, it’s the same Alfred Nobel who started and funded the Nobel Prizes for
Real rabbits in the wild don’t look quite like Bugs Bunny, of course. After all, they’re not really tall and they don’t stand on two feet
If you study the history of dogs, you wouldn’t necessarily expect them to be considered man’s best friend. Dogs trace their lineage back to wolves. In fact, dogs share 99% of
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