Pascal's hometown in Clermont, France.

Pascal’s law states that the pressure on a fluid is equal in all directions and in all parts of the container. As liquid flows into the large container at the top of this illustration, pressure pushes the liquid equally up into the tubes above the container. The liquid rises to the same level in all of the tubes, reguardless of the shape or angle of the tube.

Pascal's invention of the Arithmetical Triangle.

In 1642, Blaise Pascal developed a mechanical calculator to speed arithmetic calculations for his father, a tax official. Numbers are dialed in on the metal wheels on the front of the calculator. The solutions appear in the little windows along the top.

Pascal had a very short life and only lived up to 39 years of age. However, in this period of time, he made many achievements in physics, religion, and mathematics.