Black Hole Entropy
Lecture no. 20 from the course: Mysteries of Modern Physics: Time
Taught by Professor Sean Carroll | 29 min | Categories: The Great Courses Plus Online Science Course
Stephen Hawking showed that black holes emit radiation and therefore have entropy. Since the entropy in the universe today is overwhelmingly in the form of black holes and there were no black holes in the early universe, entropy must have been much lower in the deep past.