Can a candle burn in a spaceship, where everything is weightless? Well, NASA astronauts tried it out in a space shuttle. They found out that candles can burn in outer space! But they burn more slowly than on Earth.
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So far, many countries have sent their astronauts into space. The first human in space was the Russian astronaut Yuri Gagarin. In April this year, Korea also sent its first astronaut Yi So-yeon into space. She became the 49th female astronaut in the world. But do you know what the first animal in space was?
Everyone gets hiccups sometimes. But have you ever wondered where these funny sounds come from? Your hiccups start in your diaphragm, a dome-shaped muscle at the bottom of your chest.
Men have always wanted to explore space. Finally in 1959, NASA (National Aeronautics and Space Administration) selected seven people to be first astronauts in the U.S. Project Mercury and project Gemini were America’s first human space programs, and th
Venus is the hottest planet in the solar system. It is also the brightest of all planets. In fact, it is the brightest object in our sky, besides the sun and moon. Venus is also known as the “Morning Star” and the “Evening Star.”
The Earth is the third planet in order from the Sun. It is about 150 million kilometers from the Sun. The Earth is the only planet known to have life. Scientists have discovered past evidence of water on Mars. They have also found the building blocks of l
- The moon weighs 81 billion tons. - When the moon is directly over your head, you weigh slightly less. - It takes about 1.25 seconds for moonlight to reach the Earth.
DNA (deoxyribonucleic acid) was first discovered by Friedrich Mieschler of Switzerland in 1869. It is a very important molecule found in all living cells. It is the main genetic material in all living organisms. It contains information used in everyday me
Lightning bugs (or fireflies) glow in the dark. But why do they flash? They do this to find mates. The females flash at flying males. Then the males flash back and try to find females of the right species. A short flash dialogue takes place as the male fl
Comets are made out of dust and ice. They are like a dirty snow ball! Scientists sometimes call them planetesimals. These icy comets orbit the Sun in two different places. One place is called the Oort cloud, and the other is called the Kuiper Belt.
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