Energy from the Sun is the result of a process called nuclear fusion. This is a reaction that happens in the Sun’s core. There, extreme heat and gravity

Decades ago, people made puzzles by hand. They used jigsaws to cut each piece out of wood or cardboard. Some specialty puzzle makers still do so today,

That tiny hammer is called a gavel. It’s typically made of wood and paired with a base on which it can be hit. Why do judges use gavels? To maintain order

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

Did your parents pick out the color of your eyes? Not exactly, but they did play a big part in determining their color. How? They passed along their

When you study history, do you have an appreciation for how early humans survived way back when? Hunting and gathering food in the wild must

We do it so often — and without thinking — that it’s easy to forget about. We can go days without water and possibly weeks

How about some coffee or an energy drink? A caffeine boost is sure to do the trick, right? After all, that’s what most of us have learned over

The gasoline that powers your vehicle doesn’t occur naturally like water in a stream. So where does it come from? Gasoline actually must be produced from a thick, dark

If you spend much time outdoors, you already know that the wind comes and goes. But where does it come from? And where does it go? When

What do you do when Old Man Winter comes calling? If you’re at home, you might turn up the heater or throw an extra blanket on your

Have you ever WONDERed what your body’s largest organ is? Could it be your heart? After all, your heart has to be plenty big and strong to pump

It’s a mystery that has puzzled scientists for centuries. As far back as the 1930s, scientists knew that plants somehow sensed the length of days

We love to watch the flames jump up and down, slowly toasting the marshmallows to golden-brown perfection. It’s easy to get entranced by the flicker of the flames. We enjoy seeing

With a rich, creamy texture that’s full of flavor, yogurt is a favorite treat of kids all around the world. Whether it’s plain yogurt or a fruity flavor, such as strawberry, banana, or raspberry, yogurt offers a healthy alternative that

Most likely, though, you use that common greeting that most people use: a simple “Hello.” After all, hello is one of the most popular ways to greet

Have you ever eaten blue cheese? It’s often crumbled onto salads or made into salad dressings. It has a unique smell that some people like and others don’t.

Deadlines are time limits that are set so that a particular task or goal is completed or achieved no later than a certain point in

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

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

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

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

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

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

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

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

Fireflies glow because they are bioluminescent. That means they naturally contain a chemical that makes them light up. And fireflies aren’t alone! Other animals with this trait include jellyfish,

Iceland is a large island. In fact, it’s the world’s 18th largest island. Most of the population, however, lives in the southwestern part of the country, in

Unlike airplanes, helicopters feature spinning wings called blades or rotors on top. As a helicopter’s blades spin, they create a force called lift that allows

That first meal of the day is more commonly known as breakfast. If you divide this compound word into two parts, you’ll see it’s made up of “break”

Kiwi can refer to a few different things. For example, it’s a fruit that’s sometimes called kiwifruit. It’s also called Chinese gooseberry. These small, egg-shaped

Most spelling bees start out with short, easy words. You might be asked to spell “bake” or “sea.” As the competition goes on, though, words get longer

Known by the scientific name Electrophorus electricus, the electric eel is an electric fish able to generate powerful electric shocks. Electric eels use their shocking abilities for hunting and self-defense.

1.: – मांसपेशियों में किस अम्ल के एकत्रित होने से थकावट आती है ? Ans : – लैक्टिक अम्ल 2.: – अंगूर में कौन-सा अम्ल

Birds are the only dinosaurs left. That might seem strange. A pigeon or a penguin doesn’t look much like a Tyrannosaurus. But the connection is