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- 소행성의 근접신호과학동아 198908
- planted in its path, or by something more advanced. (It would be a “Star Wars” defense aimed at asteroids rather than at enemy missiles.)As far as I know, I was the firse to suggest this, but s ...
- 지하생활과학동아 198907
- procedures that would be necessary and, of course, the danger of fire-which may do more damage in the caverns than in the open.By the way, once again I am not a totally dispassionate observer; ...
- 귀소하는 거북과학동아 198907
- a multi-million-year separation. The difference was of a size that suggested a separation of only 40,000 years rather than 40 million.That gives rise to two possibilities. In one case, the homi ...
- DNA분자를 처음 보다과학동아 198906
- Clinton J. Davisson, was able to detect such waves produced by electrons. These electron-waves were much shorter than ordinary light-waves. They were, in fact, about the size of x-ray waves. B ...
- 마지막 남은 청정지역과학동아 198906
- incident, several hundred tons of diesel fuel were spilled. Diesel fuel spreads out and evaporates more rapidly than fuel oil― but it is also more toxic.Unfortunately, all chemical processes te ...
- 예수의 수의과학동아 198905
- to those inflicted on Jesus, according to the biblical account.It was first put on display about 1350, more than 13 centuries after Jesus' death, and no one ever explained where it had been all ...
- 대기권 밖의 망원경과학동아 198904
- and that should give us new information about them.The Hubble space telescope will see comets at greater distances than Earth-bound telescopes can. It may give us new information about the vas ...
- 지진 The Earth Trembles과학동아 198904
- 소련의 아르메니아에서 수만명의 생명을 앗아간 최근의 지진과 그 후에 소련의 타지키스탄에서 일어난 지진으로 인하여 우리는 진동하는 지구에 대하 ... of money that could be spent more usefully on "down-to-Earth" problems, we can ask : What can be more down-to-Earth ...
- 인류최초의 발견─불의 사용과학동아 198903
- was a simpler hominid called Homo erectus, who looked more like us than any ape, but had a brain only a little more than half the size of ours.Nevertheless, he was brainy enough to disco ...
- 산불의 냉각효과과학동아 198902
- burning over the period of a month of 80 squares miles of forest. There have been estimates that in a nuclear war more than 80,000 square miles of forest would burn. The burning of industrial p ...
