More recent finds along the entire coast revealed to archaeologists that the difference between the two can simply be ascribed to different types of tools and not to different cultures. Coastal fauna provided a means of livelihood for fishermen and hunters, who may have made their way along the southern coast about 10,000 BC when the interior was still covered with ice. It is now thought that these so-called "Arctic" peoples came from the south and followed the coast northward considerably later.