Here is search logs of 650,000 AOL users. It's very interesting to view search history of particular person and analyze his personality. Let's do it together! Read more about AOL search database scandal or view research papers on web searching.
The Equivalence Principle
Article from NASA about the equivalence principle (which was one of the basic axioms used to develop general relativity) and various experiments that have been and will be undertaken to test its validity.