Superfluidity—the ability of a substance to flow with zero viscosity—was previously thought to be a property limited to bulk liquids like Helium-3. However, scientists have now observed superfluidity in a single molecule of hydrogen. By cooling molecular hydrogen to near absolute zero (1–2 K), they observed the molecule entering a state where its rotation becomes entirely frictionless. This discovery overturns the idea that superfluidity is strictly a “bulk” phenomenon and suggests that quantum biological processes might be far more efficient than we ever imagined.
Source: Physics World / RIKEN
Link: https://physicsworld.com/a/top-10-breakthroughs-of-the-year-in-physics-for-2025-revealed/
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