On December 17, 1903, the Wright brothers (Wilbur and Orville Wright) flew the sky for the first time, surprising the whole world. Now, 42 years after putting a man on the moon, it is hardly the end. With the development of sustainable technology, such as
[379호]
On April 20, scientists said that they had found the world’s largest spider fossil in inner Mongolia, near China. This was an exciting discovery for many scientists because not only was the spider fossil huge, but it was also preserved very well due to v
[378호]
We use plastic products every day. Just take a look around you for a moment. You will be surprised to know that you are actually surrounded by plastics! From bottles to electric appliances, a large number of products are made of plastic. It is true that p
[377호]
On April 12, Russia celebrated the 50th anniversary of Yuri Gagarin’s space flight. Mr. Gagarin was a Soviet pilot and cosmonaut. He was the first human being to journey into outer space. On April 12, 1961, he became the first man in space when his Vosto
[376호]
The ozone layer is very important for us. This is because the layer of gases protects the Earth from damaging ultraviolet (UV) rays. UV rays can cause sunburn, cataracts, and skin cancer. They can also damage vegetation.
[375호]
Many people all over the world use cell phones every day. They are charged by electricity. To our surprise, however you will be able to charge your cell phone with your heartbeat soon! Recently, American scientists at Georgia Institute of Technology devel
[374호]
Mars is the most Earth-like planet in the Solar System. It is the fourth planet from the Sun. The planet is named after the Roman god of war, Mars. It is also called the Red Planet because of its reddish color. Mars can easily be seen from Earth with the
[373호]
Tsunamis are very powerful. They can sweep away ships, houses, buildings, and cars. A strong tsunami can even wipe out a whole village! It actually happened in Japan recently. Korea is not really safe from tsunamis, either. But most Koreans still don’t k
[372호]
On March 9, the space shuttle Discovery returned to the Earth after a successful trip to the International Space Station (ISS). It was Discovery’s 39th and final mission. It is NASA’s oldest space shuttle. Discovery ended its career as the world’s most
[371호]
Have you ever seen an aurora? It is a natural light display in the sky. Auroras are usually seen at night particularly in the Polar Regions. Therefore, they are also called the “northern lights” or “polar lights.” They are often seen in Canada, Alaska
[370호]
[이전10개] 71 72 73 74 75 76 77 78 79 80 [다음10개]
