This theory proposed that the continents were once joined together in a single supercontinent called Pangaea and have since drifted apart over millions of years.

He based his theory on several pieces of evidence:

* Matching coastlines: The shapes of the continents on either side of the Atlantic Ocean fit together like puzzle pieces.

* Fossil evidence: Identical fossils of plants and animals were found on continents now separated by vast oceans.

* Geological evidence: Similar rock formations and mountain ranges were found on different continents.

* Climate evidence: Glacial deposits were found in tropical regions, suggesting that these areas were once located near the poles.

While Wegener's theory was initially met with skepticism, it laid the groundwork for the later development of plate tectonics, which is the modern theory that explains the movement of Earth's lithosphere.