Can Cell Phones Kill? Let's say that you are standing on the 102nd floor of the Empire State Building in New York City. In your hand you are holding a precious Ming Dynasty vase. As part of an experiment, you let the ...
In 1608 an Englishman named Thomas Coryate visited Italy. He liked the country and wrote down every interesting thing he found. But there wasfound more interesting one thing which he than the others. In his diary Thom...
Bottle Letters.Some people don't need a mailbox to send a message. They use a bottle instead. Here are two stories about people who sent a message in a bottle. Both stories are true.
Saving Paper In the 13th century, the famous Italian traveler, Marco Polo, traveled a long way to China. During his stay in China, he saw many wonderful things. One of the thing she discovered was that the Chinese us...
Ants in Space Many people will remember the flight of the space shuttle(航天飞机) Challenger,in June, 1993. The achievement of Sally Ride,America's first woman astronaut to fly into space, made this flight especially...
After almost 30 years of arguing that a black hole swallows up everything that falls into it, British astrophysicist(天体物理学家) Stephen Hawking moved backward last week.