$post_author: WP_User Object
(
    [data] => stdClass Object
        (
            [ID] => 6029
            [user_login] => Jeff Deist
            [user_pass] => $P$Bnn1hX9Z/5OFQwxXWbJi2CoQftWIcC.
            [user_nicename] => jeff-deist
            [user_email] => [email protected]
            [user_url] => 
            [user_registered] => 2014-01-22 17:01:43
            [user_activation_key] => 
            [user_status] => 0
            [display_name] => Jeff Deist
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        )

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get_the_author_meta: 

$bio: Jeff Deist [send him mail] is president of the Mises Institute, a tax attorney, and a former staffer for Ron Paul.

$bios: Array
(
    [0] => Jeff Deist [send him mail] is president of the Mises Institute, a tax attorney, and a former staffer for Ron Paul.
)

Jeff Deist [send him mail] is president of the Mises Institute, a tax attorney, and a former staffer for Ron Paul.