Have you ever seen a falling star? Falling stars are also called shooting stars. You can sometimes see shooting stars in the night sky. Many people in the world think that seeing a shooting star is a good sign. Some people even believe that if you make a
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The world is filled with colorful things. From red to purple, we can see many beautiful colors. However, some people are color-blind. It doesn't mean they can't see any color at all. It means that they have trouble seeing the difference between certain
Genes are the things that determine your physical traits. Each cell in the human body has about 25,000 to 35,000 genes. They carry information that helps make you who you are - curly or straight hair, long or short legs, even how you might smile are all p
After taking a bath, your fingers and toes wrinkle. Why does it happen? The outermost layer of the skin swells when it absorbs water. It is tightly attached to the skin underneath. So it compensates for the increased area by wrinkling.
A mesa is a type of land formation that sticks out from the earth below with a flat surface on top. The shape of this landmass is similar to a table. That is why it is called a mesa. Mesa means "table" in Spanish.
A sunspot is a dark spot on the surface of the sun. It appears for a few days or weeks and then disappears. The average sunspot is about the same diameter as the Earth! Sunspots are areas on the solar surface that appear dark because they are cooler than
A black hole is the last phase in a massive star's life cycle. But to better understand this concept, you need to know about the life of a star. Stars are large hot bodies of hydrogen gas that burn brightly for millions or even billions of years through
Hybrid cars are cars that are powered by an electric battery as well as a gasoline engine. Most regular cars have a gasoline-powered engine only. Hybrid cars are more efficient in their use of gasoline.
Mars probably is the only planet in our solar system that we can live. But living there will be very difficult. In order to live there, you will have to carry everything with you when you leave the Earth. For example, you will have to take water with you
Polar lights are also called northern lights or auroras. Auroras are natural colored light displays. You can see them in the night sky, particularly in the polar zone. So some scientists call them "polar auroras" or "aurora polaris."
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