Chien-Shiung Wu was an expert in nuclear physics, making many significant contributions to not only the field, but our understanding of the Universe.

From pasteurization to the first manufactured vaccines, Louis Pasteur made breakthrough discoveries in disease prevention and public health.

Famous for his work on radioactive elements and the development of radiotracers, George de Hevesy made the first observations of biological processes in living organisms possible.

Paleontologist, historian, evolutionary biologist, writer; Stephen Jay Gould sparked a revolution in how scientists view evolution.

Credited as one of the first computer scientists, Ada Lovelace saw the potential of computers a century before any were ever built.

Biochemist and astrobiologist Emmett Chappelle created a simple means of identifying life and opened a new world for fluorescence testing.

With the launch of the James Webb Telescope, this edition of Pioneers in Science honors an integral member of its mission: John Mather.