锤先森G330__issue习作集合贴

bairongUID：3607808

To begin with, the author of the argument states that the human couldn’t cause the extinction of large mammal species in the Kaliko Islands by pointing out that there is no evidence that shows any essential contact between human and mammals. However, extinctions of mammal species happened at least 3000 years ago,which indicates that the evidence of contact might exist but couldn’t be discovered by people right now. It’s possible that the geological structure of the Kaliko Islands has changed significantly during the past years, and the evidence of contact between mammals and humans has been buried so deep that people might not have the ability to detect them right away. Consequently, the conclusion might be unconvincing if the evidence of the contact do exists. （这儿应该是contact的证据不是extinctions的证据吧）
For instance, the local people in Kaliko Island might use these bones to feed their dog, which makes the bones that couldn’t be seen by people now.
Hence, the human might still be a main factor of causing extinctions if their life had negative influence on mammals, which means that climate change or environmental factor might not be the only reason that causes the species’ extinctions.

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