The Mpemba effect is the observation that very hot liquids or colloids (such as ice cream) can freeze more quickly than colder ones, for similar volumes and surrounding conditions.

Mar 12, 2024 · What Is the Mpemba Effect? The Mpemba effect is a physics concept that postulates that when hot water and cold water are placed in the identical freezing environment, the hot water will …

Mar 20, 2025 · At its simplest, the Mpemba effect refers to situations where hotter substances cool more quickly than their cooler counterparts, sometimes even freezing faster. Most famously, this has been …

Aug 29, 2025 · Understanding why hotter water can freeze faster than colder water — a phenomenon known as the Mpemba effect — is important for gaining deeper insights into systems far from …

Jul 8, 2026 · The Mpemba effect refers to the counterintuitive phenomenon that an initially hot system can freeze faster than an initially warm one. Recent years have brought major advances in both …

Mar 26, 2025 · The Mpemba effect, whereby hotter systems can cool faster than cooler ones under identical conditions, was first noted by Aristotle over 2,000 years ago. It was rediscovered in 1963 by …

Nov 24, 2016 · The Mpemba effect is the name given to the assertion that it is quicker to cool water to a given temperature when the initial temperature is higher.

Many sharp readers may have already come up with a common proof that the Mpemba effect is impossible. The proof usually goes something like this. Say that the initially cooler water starts at …

Aug 12, 2020 · With the Mpemba effect, sometimes the hotter water reaches the finish line first. But it gets more complicated. For one thing, water usually has other stuff, like minerals, mixed in.

Mar 25, 2026 · Over the past decade, scientists have uncovered similar “Mpemba effects” in a zoo of different materials—from crystallizing polymers to magnets. More recently, the effects have turned up …