Georges Cuvier was a French zoologist and naturalist. A major figure in the early 19th century's research of natural sciences, Cuvier played an important role in establishing the fields of comparative paleontology and anatomy by comparing fossils with living animals, for which he is sometimes regarded as the founding father of paleontology.
Paul Bert was a French physiologist, zoologist, and politician. Referred to as the Father of Aviation Medicine, Bert is best remembered for his 1878 work La Pression barometrique, which explains the physiological effects of air-pressure. Paul Bert is also credited with describing oxygen toxicity for the first time.
Best known for exploring the geology of the Tertiary Period, Alexandre Brongniart initially taught natural history and then became a professor of mineralogy. He also worked for the development of porcelain enameling in France. His other works include a classification of reptiles and the introduction of geologic dating.
Born to famous botanist Augustin Pyramus de Candolle, Alphonse Pyrame de Candolle had initially studied law but switched to botany later. Part of the Royal Swedish Academy of Sciences, he made significant contributions to phytogeography. He also called the inaugural International Botanical Congress for standardizing botanical nomenclature.