Via Cosma in comments at the other place I hang out, this is a very nice teaching tool for the sole and single purpose of getting this point across to students. NB that you need to be logged into a Google ID to use it. My favorite so far is the .8222 correlation between my random graph and searches for “frogsex” (the mind squirbles).
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(If there's one thing we know about comment trolls, it's that they're lazy)