Gabrielle Émilie Le Tonnelier de Breteuil, Marquise du Châtelet, was a French mathematician, physicist, and author who lived from 1706 to 1749. She was known for her work in mathematics and physics, particularly for her translation and commentary on Isaac Newton's Principia.

Born into a noble family, Gabrielle Émilie received a thorough education in mathematics and the sciences, which was uncommon for women at the time. She married the Marquis du Châtelet, but their marriage was not a happy one, and she conducted numerous affairs throughout her life.

Despite the societal constraints placed on women in the 18th century, Gabrielle Émilie continued to pursue her passion for science and mathematics. She corresponded with many leading intellectuals of her time and conducted experiments to further her understanding of physics.

Gabrielle Émilie's most significant contribution to the field of science was her translation of Newton's Principia into French, which made his complex theories more accessible to a wider audience. She also added her own commentary and explanations, shedding new light on Newton's work.

Sadly, Gabrielle Émilie died at the young age of 42 due to complications from childbirth. Despite her short life, she made a lasting impact on the fields of mathematics, physics, and philosophy, and her work continues to be studied and admired to this day.