Now think of the exact inverse: a thin film of air surrounding a sphere of liquid and floating in a liquid medium. That is called an antibubble. You can make them in a beaker of soap bubble solution.
An antibubble, with its modest bouyancy, floats slowly upward to the surface just as a soap bubble floats delicately downward.This YouTube video has other permutations: zero gravity bubbles, bubbles-within-droplets, and a "bubble war" filmed in slow motion and explained by a NASA scientist.
Wikipedia on Antibubbles, link.
Ow man this gives me the feeling of what fish must experience when they go outside the water-sphere and discover fire, ....
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Your scientific posts are as enjoyable as the art ones.
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