听力题 M: Hey, Jane! What''s so interesting? W: What? Oh, hi, Tom! I''m reading this fascinating article on the societies of the Ice Age during the Pleistocene period. M: The Ice Age? There weren''t any societies then—just a bunch of cave people. W: That''s what people used to think. But a new exhibit at the American Museum of Natural History shows that Ice Age people were surprisingly advanced. M: Oh, really? In what ways? W: Well, Ice Age people were the inventors of language, art, and music as we know it. And they didn''t live in caves; they built their own shelters. M: What did they use to build them? The cold weather would have killed off most of the trees, so they couldn''t have used wood. W: In some of the warmer climates they did build houses of wood. In other places they used animal bones and skins or lived in natural stone shelters. M: How did they stay warm? Animal-skin walls don''t sound very sturdy. W: Well, it says here that in the early Ice Age often faced their homes toward the south to take advantage of the sun—a primitive sort of solar heating. M: Hey, that''s pretty smart. W: Then people in the late Ice Age even insulated their homes by putting heated cobblestones on the floor. M: I guess I spoke too soon. Can I read that magazine article after you''re done? I think I''m going to try to impress my anthropology teacher with my amazing knowledge of Ice Age civilization. W: What a show-off?