Scientists recently say that more than 20% of the world’s reptiles (爬行動物) are in danger of going extinct (絕種). The main threat to reptiles is the loss of their natural homes due to increasing human activities. Reptiles are cold-blooded vertebrates（脊椎動物）. Vertebrates have backbones. They have dry skin covered with scales or bony plates and usually lay soft-shelled eggs. ...Read More
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