: How did human beings learn that wax can be used as fuel for candles?
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You know how kids (boys especially) tend to light things on fire just out of curiosity? That behavior is not new. Curiosity is an advantageous trait. Trying new things leads to discoveries that are helpful for our survival and advancement. Over thousands of generations, human populations that adopted an appropriate level of experimentation out innovated those who were more conservative. Those who were *too* experimental would have become victims of their own experimentation.
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