We must expect to fail... but fail in a learning posture, determined no to repeat the mistakes, and to maximize the benefits from what is learned in the process.
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Do you want to be safe and good, or do you want to take a chance and be great?
Evolutionary biologists are not content merely to explain how variation occurs within limits, however. They aspire to answer a much broader question-which is how complex organisms like birds, and flowers, and human beings came into existence in the first place.

