Obsolete scientific theories

Okay kiddo, let's talk about scientific theories. Scientists come up with theories based on what they think might be true about how something works. Sometimes, new information is discovered that shows the theory isn't quite right. When this happens, scientists have to modify the theory or come up with a new one.

Now, "obsolete" means something is no longer used or needed. So, "obsolete scientific theories" are theories that scientists once believed were true, but we now know they aren't quite right because new information has been discovered.

For example, long ago scientists thought the Earth was the center of the universe and everything else orbited around us. But now we know that's not true at all! We understand that the Earth is just one planet orbiting a star called the Sun, and that our whole solar system is just a tiny part of our galaxy.

So, as we learn more and more about the world around us, some theories we once believed in become obsolete because we've discovered they don't quite explain things accurately.