d라이브러리
"NOT"(으)로 총 257건 검색되었습니다.
- 최고(最古)의 날짐승과학동아 l1988년 08호
- fossil was the size of a robin.(The smaller an organism, the easier it is for it is for it to fly.)The new fossil has not entirely divorced itself from its lizard forebears. Its hind limbs and ...
- 별을 본다는 것(점성술)과학동아 l1988년 08호
- and far-out nonsense. It is no use for scientists to explain there's nothing to such things, The superstitious know nothing about science and would, in any case, refuse to accept reason, ...
- 마지막 정리과학동아 l1988년 07호
- of cubes, of fourth powers and so on. He scribbled in the margin of the book that you could add squares to get another square, but there it stopped. No cubes or any higher powers could be adde ...
- 우리는 지금 몇 살인가?과학동아 l1988년 06호
- Neanderthal man and modern man as different species again.Also, if Neanderthal man and modern man coexisted on Earth not for 5,000 years, but for 55,000 years, why should it have taken modern m ...
- 윤초(閏秒)과학동아 l1988년 06호
- of Dec. 31,1987. The one before was added as the final second of June 30, 1985. This is something that is necessary not for astronomers, but for those who navigate ships, for those in charge of ...
- 감마선의 시사과학동아 l1988년 05호
- fields strong enough to cause matter to spiral in tight turns that automatically emit X-rays, but the fields cannot force the matter to spiral so tightly that they will emit gamma rays. Black h ...
- 성단(星団)이라는 측정자과학동아 l1988년 05호
- of them, we can compare that with the luminosity they really have and calculate the distance. In a way, it might not seem this gives us anything new. A bright globular cluster is about as brigh ...
- 알기 어려운 쿼크과학동아 l1988년 04호
- sure of that if we've never studied them in their free state?In fact, we can't even be sure they exist at all and are not just mathematical conveniences. For instance, we know that a dollar is ...
- 우주의 비밀을 알려줄 폭발과학동아 l1988년 04호
- 만약 우주에 반(反)물질과 같은 것이 있다면 과학자들은 그것을 검출하는 방법을 곧 알아낼 것이다.한때 과학자들은 반물질이 반드시 존재해 ... we will know we have found an antistar (existing, perhaps, in an antigalaxy), and that may help us re-evaluate our n ...
- 가장 생명력이 강한 것과학동아 l1988년 03호
- evolved to that advanced stage of development 80 million years ago, bees must have formed long before that - perhaps another 80 million years before. This is of importance in connection with pl ...
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