Ibn al-Haytham
Ibn al-Haytham transformed the study of light, vision and evidence. His Book of Optics helped lay foundations for experimental science, showing that knowledge grows strongest when curiosity is tested against observation.
Henrietta Swan Leavitt
Henrietta Swan Leavitt transformed astronomy by discovering the relationship that allowed humanity to measure the universe. Her meticulous work on variable stars became the foundation of modern cosmology and changed our understanding of the cosmos forever.