sentence: Snow is full of air spaces, which helps it hold in warmth.
sentences_before: Eskimos lived in tents made of animal skins during the summer. In the winter they lived in sod houses and igloos. They could build an igloo out of snow bricks in just a couple of hours.
sentences_after: With just a blubber lamp for heat, an igloo could be warmer than the air outside. The Eskimos made very clever things from the bones, antlers, and wood they had. They invented the , which was used to hunt seals and whales. They built boats from wood or bone covered with animal skins. They invented the 'kayak' for one man to use for hunting the ocean and among the pack ice.
concept_name: snow
headings: Inuit Life in the past
categories: Native American Arctic