# Born June 19, 1623 in Clermont-Ferrand, Blaise Pascal was a mathematician, physicist, philosopher, Catholic theologian and apologist.

On this day (June 19), 1623, Blaise Pascal was born in Clermont-Ferrand. He was a mathematician, physicist, philosopher, Catholic theologian and apologist.
Étienne, Pascal's father, decided that he would only educate his children, because they all showed extraordinary intellectual capacity, in particular his son Blaise. Young Pascal showed an amazing aptitude for math and science.
In 1642, in an effort to ease the endless and exhausting calculations and recalculations of taxes owed and paid by his father (a job into which young Pascal had been recruited), Pascal, who was not yet 19 years old, built a mechanical calculator capable of addition and subtraction. , called Pascal calculator or Pascaline .
In mathematics he contributed in various fields:
• Probability Pascal's development of the theory of probability was his most influential contribution to mathematics. John Ross writes: "The theory of probability and the discoveries that followed it changed the way we consider uncertainty, risk, decision making, and the ability of the individual and society to influence the course of future events"
• Treatise on the arithmetic triangle. Pascal's Traité du triangle arithmétique, written in 1654 but published posthumously in 1665, describes a convenient tabular presentation for binomial coefficients which he called the arithmetic triangle, but is now called Pascal's triangle.
• Cycloid. Pascal had completely abandoned the study of mathematics. But it so happened that one night in 1658 he suffered from a terrible toothache, or perhaps one of the first headaches that would be permanent in his last years of life, and to try to distract himself from the pain he suffered, he decided to dedicate himself to the study of the cycloid curve. The cycloid is the geometric curve that describes a point of a circumference that rolls on a straight line. While he was working that night on the cycloid, the toothache ceased, which was interpreted by Pascal to mean that the study of mathematics did not displease God and he once again devoted some of his time to scientific research. Li>
His contributions to physics were:
• Fluid dynamics. His work in the fields of hydrodynamics and hydrostatics focused on the principles of hydraulic fluids. His inventions include the hydraulic press (which uses hydraulic pressure to multiply force) and the syringe.
• Empty. Before Pascal, most people (especially Descartes) had held the view that the atmosphere was more or less contiguous with space and that space was filled with air or, rather, an ether without mass, a concept that goes back to Aristotle. En 1648, where the intrepid brother-in-law of the great mathematician Blaise Pascal (1623-1662), climbed a mile above sea level with two mercury barometers. The mercury level dropped, showing that the weight of the atmosphere at high altitude was less than at sea level. That showed that the atmosphere has a finite height and, conversely, that there was an infinity of empty space above it.
As a curiosity to comment that because of Blaise Pascal's work in physics related to pressures it is called pascal (symbol: Pa ) to the unit of pressure derivative of the SI which is used to quantify internal pressure, strain, Young's modulus and the maximum tensile strength
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- son, to pick up the room
- I can't dad
- why?
- because I'm studying
- study later
- I don't have time to read everything for tomorrow
- well, having started before
- dad...
- to collect
- I'm not sure about the unit of pressure
- what?
- the pascal
- neither pascual, nor Javier, nor gabriel... to pick up!
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