1. Fossil Evidence: Wegener noticed that the same plant and animal fossils were found on different continents, even though the continents were currently separated by oceans. For example, he found Glossopteris, a fern, in South America, Africa, India and Australia, and Mesosaurus, a reptile, in South Africa and South America. This suggested that these continents were once connected and that the fossils were deposited before they drifted apart.

2. Rock Formation Matching: Wegener observed that the rock formations on the coast of South America seemed to fit together like pieces of a puzzle with rock formations on the coast of Africa. This suggested that these continents had once been joined together.

3. Climate Evidence: Wegener noticed that the climate of certain continents seemed to be related to their current position on the globe. For example, South America and Africa have similar climates, while Antarctica has a much colder climate. Wegener believed that this could be explained by the movement of the continents over time.