Exercise 4: Complete the sentences below. Write ONE WORD ONLY from the passage for each answer. Bringing the mammoth back to life Mammoths once lived in large numbers across Asia, Africa, North America and Europe. However, over time, their numbers fell until the mammoth became extinct. Scientists think this happened for two reasons. Firstly, the mammoths' natural habitat decreased in size because of climate change. Secondly, many mammoths were killed by people who hunted them. The last population of mammoths lived on Wrangel Island, off north-east Siberia in the Chukchi Sea. These were woolly mammoths that could survive in very cold conditions, but they also died out around 4,000 years ago. Prehistoric cave paintings show us that people ate the woolly mammoths they killed, but also used their bones and tusks. They used these to make simple animal and human figures, an early kind of art, and also to create some basic tools. We also know a lot about the woolly mammoth because the freezing conditions in Alaska and Siberia have preserved them. Researchers have studied their skeletons, their teeth and even the grass and plants that were still inside their stomachs. We know that their fur was an orange-brown colour, they had a thick layer of fat, and they had long, curved tusks. Their ears were short compared to an