A child prodigy, Pascal made essential additions to Descartes' work at the age of 16. By the age of 19, he had invented the world's first mechanical calculator. But despite his immense contributions to modern science, it is Pascal's wager with God that set him apart as a man fully engaged with both religious and scientific pursuits. One night in 1654, Pascal had a visit from God, an experience that would change his life. Struggling to explain God's...