From the crest of a wave in the sea to the surface of a glass of water, there are always small fluctuations in density at the point where the air comes in contact with a liquid. Until now, it was thought that the atoms in these regions behaved as if they were in a 'drum skin', based on the assumption that the surface tension between the two elements caused the water to be drawn taut like a drum and to act as such when disturbed.
from Latest Science News -- ScienceDaily http://bit.ly/2AWihHV
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