* Matching Coastlines: The coastlines of South America and Africa seemed to fit together like puzzle pieces, suggesting they were once connected. This was first noticed by Francis Bacon in the 1600s and later championed by Alfred Wegener in the early 20th century.
* Geological Formations: Similar rock formations, geological structures, and mineral deposits were found on continents now separated by vast oceans. For example, the Appalachian Mountains in North America share similarities with mountain ranges found in Greenland and Western Europe.
* Fossil Distribution: Identical fossils of ancient plants and animals were found on different continents, suggesting they were once part of a single landmass. This included the discovery of fossils of the same species of reptile, called Mesosaurus, in South America and Africa.
* Glacial Evidence: Striations (scratches) left by ancient glaciers were found on different continents, indicating that they were once located at higher latitudes and covered by ice sheets. These glacial deposits also showed a consistent direction of movement, suggesting the continents had drifted apart.
* Paleomagnetism: The study of the Earth's magnetic field revealed that rocks on different continents recorded a consistent change in magnetic direction over time, suggesting they were once connected. This data showed that continents had moved relative to the Earth's magnetic poles.
It's important to note that Alfred Wegener, who proposed the theory of continental drift in 1912, faced considerable opposition from the scientific community at the time. While he offered compelling evidence, he couldn't explain how the continents moved. The development of the theory of plate tectonics in the 1960s provided the mechanism for continental drift, explaining how the Earth's crust is divided into plates that move on the mantle. This, combined with the existing evidence, finally convinced the scientific community of the validity of continental drift.
