There you go. Science evolves.
Speaking of which, up until my sophomore year in high school, I was taught there were 2 kingdoms of life, plant and animal. It all made sense. Just three years later in college there were 5 kingdoms of life. No one talked about the change had recently occurred, so I didn't really know what they were talking about. Life was plant or animal, and that was it! It took me years to adjust. Although the only thing that changed was how they classified living things. But this happened because our knowledge base increased.
In early elementary school a new theory about our planet had been proposed. The idea that continents drifted, broke apart, and hooked up with others to form new land masses. I remember my teacher talking about this and she gave some examples that supported the theory. She also told us about the objections to the theory. The theory of continental drift had been around before then, but mostly scorned, even by Einstein, I believe. It was somewhere around the time I graduated from college when scientists finally came into agreement that plate tectonics was a fact, and with aid of GPS could actually be detected and measured.
A degree of skepticism is always in order, but should be tempered by the evidence that supports a theory.
