Hot water can freeze faster than cold
The Mpemba effect describes how hot water can freeze faster than cold water under specific conditions, a counter-intuitive phenomenon that continues to intrigue scientists today.
Surprisingly, hot water can sometimes freeze quicker than cold water. This phenomenon, known as the Mpemba effect, was named after Tanzanian student Erasto Mpemba, who observed it while making ice cream in 1963. While ancient thinkers like Aristotle also noted it, scientists still debate the exact reasons.
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