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graebot t1_j30yk7p wrote

Reply to comment by Triairius in Molecularly, what make pine pitch sticky? by orangegore

If there's no atmosphere, then there's no pressure to press things together. Suction cups, for instance, do not work in a vacuum. They require atmospheric pressure to press the cup to the surface. If part of tar's stickiness comes from the suction effect in an atmosphere, then at least some of that "stickiness" must disappear

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