살고 있는 우리에게는 생각도 못할 경관이 많다. 예컨대 멕시코에 있는 제비동굴(Cave of Swallow)은 세계 최대의 수직 싱크홀로 지름 50m에 깊이가 376m에 달한다. 베네수엘라의 해발 2000m가 넘는 산 정상부에는 사리사리나마(Sarisarinama)라고 불리는 지름과 깊이가 350m에 이르는 거대 싱크홀이 단층선을 따라 ...
Some galaxies are colliding or obviously did in the past. Galactic centers seem to to contain black holes that swallow even light itself and are surrounded by packed stars and fiery flowing gas.The far-out reality of the universe is more than a trifle frightening, making humanity feel lonely and vulnerable here on our one living planet. Human eyes are limited - faint images don't activate ...
eating bees and have patterns of behavior that permit them to avoid being stung, and to remove the stinger before they swallow the bees.Again, although there are carnivorous plants that trap and digest insects, there are some insects that are not concerned about this because they have developed methods that allow them to feed on the plants in their turn.A particularly amazing example to me is ...
sea will advance inward some 18 miles, and perhaps more if there is global warming and a rise in sea level. It will swallow many square miles of fertile land and be an enormous catastrophe for Egypt unless they take measures to protect their coastline ...
동아사이언스
디라이브러리
DS스토어
팝콘플래닛
