Question

How did other scientists explain why the continents seemed to fit together?

Answer 1

Answer:

Wegener suggested that perhaps the rotation of the Earth caused the continents to shift towards and apart from each other. ... Today, we know that the continents rest on massive slabs of rock called tectonic plates. The plates are always moving and interacting in a process called plate tectonics.

Answer 2

Plate tectonics has continually shifted the position of landmasses; while some were rifted apart, creating new landmasses, others collided to create tall mountain ranges, such as the Himalayas, and combine landmasses. At a few points in Earth's history, all the landmasses were stuck together to form a supercontinent.