Summary:

• **Ancient Arctic Explorers**: About 4,500 years ago, a group of people called the Paleo-Inuit traveled across frozen seas in small boats to reach remote islands in Greenland. Archaeologists found evidence of their settlements on these islands, showing that these brave explorers were skilled at navigating dangerous icy waters.

• **How We Know They Were There**: Scientists discovered old tools, bones, and other artifacts left behind by these ancient people on the Greenland islands. By studying these objects, researchers can learn how the Paleo-Inuit survived in one of Earth's coldest and harshest environments thousands of years ago.