d라이브러리
"today"(으)로 총 44건 검색되었습니다.
- 줄어드는 삼각주과학동아 l199102
- granary of the Roman Empire.Egypt continued to be prominent in medieval times as part of the Moslem world. Even today it supports a population of 50 million people, strung all along the course ...
- 블랙홀이 지구에도 있는가?과학동아 l199101
- ferociously it must be squeezed together to form a black hole.Scientists don't know of any process in the universe today that would form a "miniblack hole," one less massive than the sun, but b ...
- 슈퍼 다이아몬드과학동아 l199010
- heat very easily. This means that the use of bits of diamond in microchips or in other miniaturized components of today's devices will keep them from overheating. In addition, of all transparen ...
- 타조알과 인류의 나이과학동아 l199007
- now be able to come to some better conclusion as to how old "modern man"(a term describing all people living on Earth today) might be.The general feeling is that modern man, Homo sapiens, first ...
- 잘못된 경종과학동아 l199005
- that millions of years ago, the Earth's atmosphere contained 30 percent oxygen, rather than 20 percent as it does today. This seems unlikely on its face. With 30 percent oxygen, any forest fire ...
- 우주적 위험과학동아 l199005
- of such rare, useful mutations.Without cosmic rays, some think, evolution would be slowed to such an extent that even today there might be no life on Earth more advanced than bacteria.All this, ...
- 두 사람과학동아 l199003
- 호모 사피엔스의 두 주요 변종이 지구위에 있었고 1989년 12월에 이 둘이 유럽에서 한동안 공존했을지도 모름을 보여주는 증거가 드러났다.첫번째 종 ... technology wiped out Neanderthal man, but there is also the possibility of interbreeding. With the evidence avail ...
- 하드디스크도 파괴하는 컴퓨터바이러스 완전 퇴치법과학동아 l199002
- 외에도 일요일 바이러스 내부에는 어처구니 없게도 다음과 같은 메시지가 포함되어 있다.Today is Sunday! Why do you work so hard?All work and no play make you a dull boy!Come on! Let's go out and have some fun!오늘은 일요일! 왜 그렇게 열심히 일만 하지 ...
- 지구가 너무 덥고 추웠을 때 When The Earth Was Too Hot and Too Cold과학동아 l199001
- in life, too, and with many continents there is more ocean-rim than there was with just one super-continent. So life today is better off… if only we don't do anything to ruin thing.(C) 1989, Lo ...
- 대 해빙과학동아 l198912
- that were was a period, 11,000 years ago, when the Gulf of Mexico contained water that was much less salty than it is today. he suggested that the ice-sheets had undergone a sudden melting and ...
이전12345 다음
