d라이브러리
"today"(으)로 총 48건 검색되었습니다.
- 태양계의 종말은?과학동아 l1988년 03호
- the latest scenario I could find.Suppose we don't have a nuclear war. Suppose we solve all the problems that face us today. Suppose we learn how to improve the human body and mind, making ourse ...
- 가장 생명력이 강한 것과학동아 l1988년 03호
- driven to extinction various large forms of life, including mammoths and mastodons, and are endangering many others today, it would appear that despite our best efforts, we have never managed t ...
- 옛 괴물들과학동아 l1988년 02호
- as much as 80 tons, 13 times as much as the largest elephant alive today. Or consider birds. The largest birds alive today are far too heavy to fly, but they can do well anyway. The ostr ...
- 시베리아에서 있은 폭발과학동아 l1988년 01호
- about an incident that took place in central Siberia 80years ago. They are still poking around in the area and, even today, are uncovering new evidence concerning it. On June 30, 1908, the skie ...
- 책의 혁명과학동아 l1987년 12호
- though both inks and writing surfaces have been improved. In earlier times, scribes wrote on parchment or tree bark. Today, paper is available more cheaply than papyrus ever was and is in more ...
- 가장 중요한 화석과학동아 l1987년 11호
- lizardlike.From all this, why not deduce that the animal is an extremely ancient reptile, ancestral to the lizards of today?That might have been the case, were it not for one all-important diff ...
- 연료만들기과학동아 l1987년 10호
- There will always remoin a demand for something simple,like the burning of fuel, and scientists are striving even today to find better, more convenient fuels, and, most important of all, fuels ...
- 가장 큰 날짐승과학동아 l1987년 09호
- energy to beat wings against the air in such a way as to rise upward and remain supported on that thin medium. Today, the only flying species that, like reptiles, are cold-blooded, are the inse ...
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