On top of that, Wegener learned that related species, too small to swim the oceans, were found on different continents, as were similar fossils. In 1912 he proposed that the continents we know ...

It's difficult to imagine a process more gradual than continental drift. But some scientists say ... Depending on location and interpretation, the fossil record seems to say different things.

The movement of Earth’s continents has influenced the distribution and evolution of species. For instance, fossils of the ...

There are similar fossils on both sides of the Atlantic – including the fossil remains of land animals that would have been unable to swim across from one side to the other.