A great land bridge once connected the continents. The remains were carried by ocean currents. A single landmass once existed with both continents. The animals swam across the ocean.
Two fossils of the same species were found on two different continents. The continents are separated by the Atlantic Ocean. Scientists dated the fossils to be 2 million years old. Which is the least likely explanation for these findings?

Options:
- A great land bridge once connected the continents.
- The remains were carried by ocean currents.
- A single landmass once existed with both continents.
- The animals swam across the ocean.

The remains were carried by ocean currents.