Daniel Bernoulli, a sixteenth-century Swiss mathematician and physicist, specialized in hydrodynamics and worked on the expansion of Newton's Second Law along with the development of Conservation of Energy laws. His greatest work included Bernoulli's Principle, which was included in his written book Hydrodynamica.
Bernoulli first made his discovery on fluid dynamics and pressure differentials by observing the motion of water through different diameter spouts. He used his observations to provide insight into blood pressure for medical sciences, and further into the fluid dynamics of hydrodynamic structures. Bernoulli's findings later became widely applicable outside of shipbuilding and medical sciences, and later became the foundations for aerodynamics and fluid dynamics.