The image above shows a thin film on the surface of liquid, which is pulled taut at the interface. As it is gently peeled away, marks of stress are revealed. A team of physicists, including Narayanan Menon, recently clarified the question about how much the thin film is being stressed, and revealed that the solid-fluid interaction – where a meniscus, or lens-shaped interface forms at the liquid surface – only depends on what the liquid is, not on the solid. This disproves an alternate theory that stress depends on how the liquid and solid interact. Read more.