What challenges did Newton face?

Isaac Newton faced several intellectual and professional challenges throughout his life. One notable challenge was his early work on understanding colors. Newton conducted experiments to distinguish colors produced by natural processes from those resulting from eye issues. This included a famous and dangerous experiment where he stuck a stick under his lower eyelid to observe how pressure influenced the perception of colors 1.

Professionally, Newton's interactions with other scientists often led to significant paradigm shifts. For example, his correspondence with Robert Hooke introduced new ways of thinking about motion and time, which eventually led Newton to develop groundbreaking theories in physics 1. Additionally, Newton's work on the Principia Mathematica involved complex mathematical challenges, such as applying his laws of motion to the solar system, which required innovative solutions and approximations to account for interactions between celestial bodies 2.