Richard Feynman is one of the best popularizers of science,and scientific curiosity available. He is also a Nobel Laureate in physics. He doesn’t dumb down science, but he knows it so intimately and so deeply, and he is so articulate that he can explain complex subjects clearly, with humor sometimes, and makes science something that is understandable to the masses.
He also doesn’t preach for you to accept and adopt his views; it is plain and simple: “Here is what I believe and why. You decide your own truths”.