Erasto Bartholomeo Mpemba(1950–2023) was a Tanzanian game warden who, as a schoolboy, discovered the eponymously named Mpemba effect, a paradoxical phenomenon in which hot water freezes faster than cold water under certain conditions; this effect had been observed previously by Aristotle, Francis Bacon, and René Descartes. https://en.m.wikipedia.org/wiki/Erasto_B._Mpemba
who, as a schoolboy, discovered the eponymously named Mpemba effect,
a paradoxical phenomenon in which hot water freezes faster than cold water
under certain conditions; this effect had been observed previously
by Aristotle, Francis Bacon, and René Descartes.
https://en.m.wikipedia.org/wiki/Erasto_B._Mpemba