SCIENCE AND TECHNOLOGY
SCIENCE AND TECHNOLOGY
A century ago communication across any distance was dependent upon the telegraph or letters. No
jets crossed the ocean, no television pictures enabled us instantly to see events in any part of the world,
there were no worldwide telephone networks and no computers. It is just a short lifetime since humanity first
travelled into space and discovered how fragile our planet looks.
FROM FIREWORKS TO THE MOON
At first glance you might think that there couldn't possibly be anything common between a 13 th
century festival in China and the Apollo 11 moon landing in 1969. However, there is a link and that is that
they both relied on the use of rockets.
The Chinese first developed rockets by filling bamboo tubes with an explosive made from saltpetre,
charcoal, and sulphur. The sealed tubes would be thrown onto fires during celebrations because it was
thought ...
annaabi.ee 
