as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
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generate five scientific facts about mammals.
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1. mammals are the only animals with fur or hair. 
2. mammals are the only animals that can produce a flap of skin, called an auricle, that serves as an acoustic channel. 
3. mammals possess a four chambered heart and can regulate their own body temperature. 
4. mammals have a neocortex, which is the part of the brain responsible for higher thought processes and various aspects of cognition. 
5. mammals reproduce through internal fertilization and give birth to live young.
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