http://www.bbc.co.uk/science/humanbo...nseschallenge/
I must add that I found this using the "stumbleupon" extension on Firefox. It selects web sites at random based on a selection of topics you tell it you're interested in and then it "learns" from what you like by you giving it a thumbs up or thumbs down. This darn thing is addictive!
You can find stumbleupon here:
https://addons.mozilla.org/firefox/138/
But be careful......you never know where you might end up!
Oh and my score on the test? A meagre 7/20....