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- 우리의 옛 선조들과학동아 1987년 12호
- the new measurements indicate they are at least 700,000 and possibley 900,000 years old. And there are hominids older than that, too (they seem to have evolved in eastern and southern Africa, w ...
- 책의 혁명과학동아 1987년 12호
- weeks of reading. When such things finally come on the market, they will undoubtedly be considerably more expensive than ordinary books, but the price should come down with time. In addition, a ...
- 가장 중요한 화석과학동아 1987년 11호
- 여태까지 발견된 화석중 가장 중요한 것이 가장 중요한 것이 가짜라고 한다면 그런 일이 있을 수 있을까? 몇몇 과학자들이 그런 주장을 펴고 있어 상당한 물의를 빚어냈다. ... have been found and they, too, have feathers arranged as in the first fossil.Three identical hoaxes? ...
- 1백억 광년 떨어진 곳에과학동아 1987년 11호
- seen at even the farthest distances we can penetrate. There seem to have been more such super active galaxies long ago than there are now. Are young galaxies more apt to be quasars? What makes ...
- 가장 오래된 것과학동아 1987년 10호
- a figure he announced in July, 1987. Since the stars are among the oldest we can see, the universe may not be more than 11 or 12 billion years old.However, Butcher's measurements are extremely ...
- 연료만들기과학동아 1987년 10호
- to do this. You have to burn some oil to get hydrogen out of other oil and, in this way, you end up with less fuel than you started with.Scientists are looking for ways to produce hydrogen from ...
- 가장 큰 날짐승과학동아 1987년 09호
- 약 6천5백만년 전 지상의 날짐승 가운데 가장 큰 덩치를 가졌던 '프테로사우루스'가 갑자기 멸종해 버렸다. '프테로사우루스'의 사라짐은 우리에게 가장 까 ... like gigantic bats in many ways, but their bone structure was that of reptiles, and in all likelihood, they l ...
- 에너지가 있는 곳으로과학동아 1987년 09호
- should give the nations of the world a vital project to rally round and impose a greater feeling of common purpose than now exists.And since any serious disagreements or controversies might adv ...
