Jean-Baptiste Biot

Jean-Baptiste Biot was a French physicist, astronomer, and mathematician who co-discovered the Biot–Savart law of magnetostatics with Félix Savart, established the reality of meteorites, made an early balloon flight, and studied the polarization of light.

21 April 1774

Born on the same birth day (21 April): Antonín Kammel • Arianne Hartono • Gerald Early • Gyula Koi • Iggy Pop • Ira Louvin • John McCabe (composer) • Mikel Oyarzabal • Nikki Cross • Ulrich von Hutten • Wilhelmine Amalie of Brunswick

Born in the same month (April 1774): Christian Leopold von Buch