The blog Google Blogoscoped writes about human predictability:
"Google Trends shows an interesting search popularity graph for the queries “turkey” (as in turkey, the food) and “diet.” Searches for the traditional turkey meal peak on Thanksgiving followed by a smaller peak on Christmas. The New Year Day's resolutions bring a surge in queries for "diet" every year, over and over again:
There is an interesting correlation between depression and rain:
Searches for "allergy" peak every spring:
Immunization "shots" searches are most popular in October/November:
The blog AllergyNotes covers some other Recurrent Trends in Allergy-related Searches on Google.
Google Trends Reveals People’s Predictability. Google Blogoscoped.
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Google Blogoscoped images under a Creative Commons license.