what do people mean when they say science is always changing, and what is the example of science changing?

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Answer 1

the easiest one is the model of our solar system.

for the longest time, everyone on the planet believed that everything revolved around the earth. so *fervently,* in fact, that anyone who dared to say otherwise was executed for heresy against God. rationalists tried forever to prove their theories, but were often met with death or excommunication. and so it remained for the longest of times.

fast forward a few hundred years, and we’re peering into the corners of the universe.