How do we know how earth looked like millions years ago? Like places of continents and how they moved?
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Basically a combination of geology and paleontology (studying dinosaurs). When looking at core samples of the earth, they can see the same things on continents that are now across oceans. There are also species of dinosaurs found on multiple continents and we know they didn’t swim there. So they had to have some way to travel between those fossils. If you look at the continents, you can kind of see that they could fit together. To map it out, they basically look at the core samples and connect the dots between ones that are similar.
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