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Surface tension occurs due to the tendency of liquid molecules to favor their own kind. Surface tension is important in fluid multiphase systems typically at small length and velocity

19 votes

What causes insects to cast large shadows from where their feet are?

That is a truly amazing picture! I am by no means an expert, but I have an idea. When the wasp stands on the water, it is curved down slightly. The light that hits these parts will then be bent more …
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