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강 여행과학동아 l1993년 11호

Scientists are still looking for ways to clean fresh water systems of PCBs.Dr. Curtis Olsen, with the U.S. ... Bones regurgitated by cormorants living near fresh water we ...

모두를 위한 남극과학동아 l1993년 07호

is also three times higher than any other continent. Its ice represents 70 percent of the world's fresh water, yet its atmosphere is as dry as a desert. And, of course, it is cold - the ...

화성에도 물이?과학동아 l1993년 06호

for scientists, as two new studies will demonstrate.On Earth, water tends to be labeled according to where it is. Surface water includes both fresh (in lakes and rivers) and salin ...

과학평론과학동아 l1991년 12호

that the intimate life of the platypus came to be known. It is an aquatic animal, living in fresh water. The bill of the duckbill is really nothing like a duck's. The nostrils are locate ...

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