This is an example of learning something new: https://www.ispot.tv/ad/A9XH/john-deere-1023e-learn-something-newNot necessarily.
History is often revised when we find out new information. The Dead Sea Scrolls gave new information about 1st Century Palestine. Geologists are proving the Egyptian Sphinx is thousands of years older than Egytologists thought. New document releases prove Martin Luther King Jr. was a sexual pervert. We now know there was no such dinosaur as a Brontosaurus. Witches were never burned in Salem, MA.
What you are talking about is the change in how History is interpreted.