The lecture is about mammoths extinction at the end of the last Ice Age arround 11,000 years ago.The professor disagreed with three theories mentioned in the reading passage and all of them have problems, as she indicated. First, she claims that mammoths were huge and powerful animals with their long tusks, so they would have been quite dangerous to hunt. Also, they had a thick skin and a thick layer of fat that would have been difficult for the sharpest spear to pierce. There is no reason why the Clovis people would have hunted them when there were smaller and less dangerous animals around. Besides, the Clovis people were small in number and were widely scattered, as she said. Secondly, mammoths had lived through severe climate changes than this change. Moreover, the African and Indian elephants survived major climate shilfs, so why didn’t the North American mammoths? Finally, she refused that infectious deseases destroyed mammoths. She points out that there is no physical support for it. In none of the remains of mammoths that have been found has there been any sign of disease, as she explained. In conclution, she says that, while it is possible that the mammoths went extinct for one or these reasons, or for combination of these reasons, it is also possible that the real reason is still unknown.
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