Here's why:
* Fossil Distribution: The presence of identical or very similar fossils on continents now separated by vast oceans suggests that these landmasses were once connected.
* Pangea: The theory of continental drift proposes that all the continents were once joined together in a supercontinent called Pangea.
* Evidence for Drift: Fossils of land animals, freshwater plants, and other organisms that could not have crossed vast oceans provide strong evidence that these continents were once contiguous.
For example: Fossils of the ancient reptile Mesosaurus have been found in both South America and Africa. Mesosaurus was a freshwater reptile that could not have swum across the Atlantic Ocean. This suggests that South America and Africa were once joined together.
Other evidence for continental drift:
* Matching geological formations: Rock formations and mountain ranges on different continents align perfectly when the continents are reconstructed into Pangea.
* Paleoclimatic data: Glacial deposits and ancient climates in different regions point to a connected landmass.
Overall, the distribution of similar fossils across continents is a key piece of evidence supporting the theory of continental drift and the existence of Pangea.