d라이브러리
"year"(으)로 총 112건 검색되었습니다.
- 토성의 테가 사라지고 있다과학동아 l1991년 08호
- small satellites may also be contributing to the disapperarance, eventually, of Saturn's rings.Of course, 100 million years is a long time on a human scale, and we need not be fearful that the ...
- 가장 깊은 호수과학동아 l1991년 07호
- in the mid-1990 by a team led by Kathleen Crane of Hunter College's Department of Geology and Geography.In recent years, it has been discovered that the oceans have places where there are "hot ...
- 하늘은 「화끈화끈」 땅은 「냉랭」과학동아 l1991년 07호
- 역사에 기록되고 있다. 이 폭발이 있은 다음 해인 1816년은 '여름이 없었던 해'(the year without summer)로 일컬어질 정도로 전세계 여러 지역에서 추운 여름이 나타났던 것으로 알려져 있다. 한 예로 이 해의 6월 상순에 미국 동부지역은 한파의 내습으로 인해 차가운 폭풍이 몰아닥치고 농지가 얼어붙고 ... ...
- 줄어드는 삼각주과학동아 l1991년 02호
- which is sinking, that means that Mediterranean sea is advancing inward.Stanley estimates that in the next hundred years the sea will advance inward some 18 miles, and perhaps more if there is ...
- 보이지 않았던 별과학동아 l1990년 09호
- glorious evening star. It was so bright that it was visible in the daytime for 23 days, and at night for nearly two years before it faded away and disappeared - - at its brightest it actually c ...
- 우주적 위험과학동아 l1990년 05호
- gravity conditions.But what if we talk about a flight to Mars where the astronauts would have to remain in space for a year and a half? What if we imagine people working on the moon over extend ...
- 두 사람과학동아 l1990년 03호
- Survey in Menlo Park, Calif., and his Spanish colleagues have found Aurignacian materials that seem to be 40,000 years old.If so, modern man collided with Neanderthal man, and the question is : ...
- 화성을 다시 찾다과학동아 l1990년 02호
- many astronomer are convinced, may have come from Mars.One of these meteorites was carefully analyzed earlier this year by a team of British astronomers under Ian P. Wright. In it, small amoun ...
- 대 해빙과학동아 l1989년 12호
- all at once, to from the drumlin fields of northern Saskatchewan. The Amazon River, the largest on Earth, takes ten years to discharge 20,000 cubic miles of water into the Atlantic Ocean, but ...
- 공룡의 죽음-열쇠가 되는 아미노산과학동아 l1989년 11호
- the time of 65 million years in the past. Perhaps they were originally in the right line but, in all those millions of years, they've managed to drift through the rocks up and down. That ...
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