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- 가솔린 바다과학동아 l1988년 02호
- essential to maintain the settlements and that are relatively rare on most of the worlds we can approach. (The moon has none of these elements, for instance, so lunar colonists will depend on E ...
- 시베리아에서 있은 폭발과학동아 l1988년 01호
- in vast numbers. Second, suppose such an event happened now in the Soviet Union or in the United States. Such a blast might be taken to be an enemy nuclear bomb, and a vengeful. The horr ...
- 나무 달력과학동아 l1988년 01호
- track the weather back 11,000 years. They can't go farther back than because before 11,000 years ago, northern Europe was covered by the glacier of the Ice Age. Nevertheless, they will have a c ...
- 책의 혁명과학동아 l1987년 12호
- time. In addition, a huge small bookcase. The scanning device must be powered, but small nuclear batteries could last through years of frequent use. But will books on computer become a n ...
- 우리의 옛 선조들과학동아 l1987년 12호
- 인류는 지구상에 새로 온 손님이다. 우리는 지구의 아주 오랜 수명과 비교해서 볼 때 이곳에 오래 동안 존재하지는 않았으나, 우리가 생각하는 것 ... as recently as two centuries ago. But (just to keep a sense of proportion) hominids have still existed ...
- 가장 중요한 화석과학동아 l1987년 11호
- Much more important, at least tow other fossils of archeopteryx have been found and they, too, have feathers arranged as in the first fossil.Three identical hoaxes? That's harder to bel ...
- 1백억 광년 떨어진 곳에과학동아 l1987년 11호
- the new discovery would show that such clusters may already have existed 10 billion years ago. If so, that would force astronomers to sharpen some of their views on how galaxies formed in the f ...
- 연료만들기과학동아 l1987년 10호
- 인간의 첫 번째 에너지원은 자신의 근육말고는 불이었다. 즉, 자신의 주변세계에서 쉽게 찾아볼 수 있는 연료를 태우는 일이었다. 우리는 다른 에너지원―태양에너지,핵융합, ... (puls sunlight) into hydrogen, burn the hydrogen and get water again. The fuel would never be used up ...
- 가장 오래된 것과학동아 l1987년 10호
- Butcher's measurements are extremely delicate and it may be that the stars he studied are not actually the oldest. Astronomers therefore reacted to the new estimate with caution. The ag ...
- 에너지가 있는 곳으로과학동아 l1987년 09호
- that the surest way of countering such a possibility is to internationalize such huge space projects that may, in any case, be too expensive for anything less than a global effort.Besides, the ...
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