On this Day: July 5 has witnessed events that reshaped science, politics, exploration and society across centuries. The date is remembered for the publication of Isaac Newton's Principia , one of the most influential scientific works ever written, the declaration of Venezuela's independence, France's invasion of Algeria, and Frederick Douglass' powerful anti-slavery speech questioning the meaning of American independence. It also marked the founding of the world's first travel agency and several important military, political and cultural milestones, making July 5 a significant day in world history.
