I written simple php code to get some url content but it dosn\'t work it return this error
file_get_contents(http://www.nature.com/nature/journal/v508
Open the page using your browser and with the console open, see that the server does indeed send a 401 even when page is sent and viewable
On php, open the url in an alternate way to ignore the error (see http://php.net/manual/en/context.http.php)
You'll also notice that it's gzip-encoded, see http://php.net/manual/en/function.gzinflate.php
Happy hacking!