d라이브러리
"world"(으)로 총 202건 검색되었습니다.
- 경제교류가 가져오는 것 Business Leads The Way과학동아 l199001
- That leaves business. These days, anything that interrupts free international trade harms everyone. Most of the world is aware of the dangers of protectionism. Nations such as the Soviet Union ...
- 없앨 수 없는 것(플라스틱)과학동아 l198912
- of life, they are broken down by air, by water and by other forms of life, and once that is done, they re-enter the world of life. That is why life has been flourishing on Earth for eons.If, wh ...
- 대 해빙과학동아 l198912
- by little, then, the glaciers retreat.Ten thousand years ago they were completing their most recent retreat and the world became as it is now.Usually, though, the coming and going of the ice-sh ...
- 20년후-달의 신비를 벗기며과학동아 l198910
- 도와줄 것이다.Twenty years ago this week, on July 20, 1969, human beings set foot, for the first time, on a world other than Earth itself. Neil Armstrong stepped down onto the moon's surface and said ...
- 바라는대로 되는 것만은 아니다과학동아 l198910
- as ordinary water, and boiled at 500 C. instead of 100 C. It was all very exciting.Instantly, chemists all over the world began repeating Deryagin's work and behold, they found polywater, too. ...
- 녹색 식물의 탄생 How Green Plants Began?과학동아 l198909
- by all animal life and that keeps us alive.Since food and oxygen are thus the gift of the green plants to the animal world, anything that would explain how they came to be is of profound intere ...
- 가장 약한 파(波)―중력파 The Weakest Wave과학동아 l198909
- 25 million to produce.What's more, to do it properly, there should be four such instruments distributed over the whole world, so that all four would be affected almost simultaneously. That woul ...
- 지하생활과학동아 l198907
- healthier conditions, than dwellers of surface cities do today.And remember, as one more point, that in an underground world of perpetually equable weather, walking would be much more pleasant. ...
- 지진 The Earth Trembles과학동아 l198904
- or take a year of so. That would give time to strengthen structures, to demolish and rebuild, with perhaps the entire world contributing. Little by little all cities would become safer and the ...
- 인류최초의 발견─불의 사용과학동아 l198903
- sea creatures may be, without fire they can never develop even the crudest technology. And fires can't be built in a world of water.When was fire first used? Until the 1980s the oldest traces o ...
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