$post_author: WP_User Object
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            [user_login] => jack-d-douglas
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            [user_registered] => 2011-12-07 15:12:31
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            [display_name] => Jack D. Douglas
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get_the_author_meta: 

$bio: Jack D. Douglas [send him mail] is a retired professor of sociology from the University of California at San Diego. He has published widely on all major aspects of human beings, most notably The Myth of the Welfare State.

$bios: Array
(
    [0] => Jack D. Douglas [send him mail] is a retired professor of sociology from the University of California at San Diego. He has published widely on all major aspects of human beings, most notably The Myth of the Welfare State.
)

Jack D. Douglas [send him mail] is a retired professor of sociology from the University of California at San Diego. He has published widely on all major aspects of human beings, most notably The Myth of the Welfare State.