Can't load my template file
You have two returns (the second will never be hit). You have declared your array twice. It should be this:

function human_theme($existing, $type, $theme, $path){
  return array(
    'human' =&gt; array(
      'template' =&gt; 'human',
      'path' =&gt; drupal_get_path('module', 'human').'/tpl',
      'type' =&gt; 'theme',
      'variables' =&gt; array(),
    ),
  );
}