php - file_get_html returning bizarre symbols

$html = file_get_html("http://www.vegasinsider.com/mlb/odds/las-vegas/?s=316");

echo $html; 

$html is returned as a bunch of strnage symbols that include vۺ�(

I though that using:

header('Content-Type: text/html; charset=utf-8');

would help, but it didn't. Any suggestions?