Read the excerpt from a black hole is not a hole. it's terrific fun to read what the original thinkers had to say for themselves. i read parts of relativity: the special and general theory by albert einstein, and found the letter about einstein forgetting to eat lunch in einstein: his life and universe by walter isaacson. i also reviewed parts of isaac newton's principia: the mathematical principles of natural philosophy (translated by andrew motte), to see what newton himself had to say. what makes these books credible sources?
-the books give opinions and arguments about science.
- einstein and newton are experts in their fields.
-the books describe einstein’s and newton’s inner feelings
.- einstein and newton persuade readers to their opinions.