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- 호박의 비밀과학동아 l199308
- microorganisms from amber is that they are about the same as those living now. This indicates that microorganisms do not readily change shape, the way so many multicellular plants and animals d ...
- 친할 만한 곰팡이균과학동아 l199307
- common ancestor, probably a single-celled organism that resembled an animal in part of its life cycle and a fungus in another part.Dr. Gerald Fink, director of the Whitehead Institute for Biome ...
- 모두를 위한 남극과학동아 l199307
- can dive. Other scientists are studying Adelie and Emperor penguins, taking care not to harm the creatures, which do not fear humans.Astrophysicists and astronomers are prominent among t ...
- 화성에도 물이?과학동아 l199306
- Mars first formed, 3.9 billion years ago.It seems that the interior of Mars was much wetter than had been thought, but not enough to account for the 'torrents' of water that once had to be on t ...
- 피부와 태양과학동아 l199306
- avoidance of sun exposure will increase the incidence of avitaminosis D(and thin bones) in people whose skin will then not manufacture vitamin D. But it's much better to eat vitamin D-added foo ...
- 최신기술과학동아 l199305
- useful energy or products. Waste Conversion Systems Inc., in Englewood, Colo., has patented a 'biomass' burner that not only disposes of old tires, newspapers, and the like, but it turns them i ...
- 가상현실과학동아 l199305
- people reading books, going to the movies, watching TV. And some lucky people — many of them writers — get VR for nothing, for they can experience as real the sights, sounds and emotions in a s ...
- PC 이상작동 응급처치 요령과학동아 l199305
- 이를테면 데이터베이스 프로그램을 사용하기 위해서는 FILES=40 정도가 적당하다.FILE CANNOT COPIED ONTO ITSELF : 파일을 복사하면서 원시파일과 대상파일의 이름을 같게 주었거나, 아니면 대상 파일 또는 대상 디렉토리를 명시하지 않은 경우 나타나는 메시지다.ATTEMPTED WRITE-PROTECT VIOLATION : ...
- 아주 높이 있는 먼지과학동아 l199304
- source of it they can find, including comets.Comet Halley's last appearance did not excite the public because it was not easy to see this time, thanks to the light pollution in Earth's s ...
- 먼지의 영향과학동아 l199304
- , top soil in the United States erodes by wind at the rate of 20 million tons a year. Some of the dust is from areas not used by humans, but most of it is caused when wind hits plowed fields or ...
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