People type all sorts of bizarre things into their search engines. Not all of them involve someone naked. But what exactly does Google know? Rather a lot, really, and not exactly what you might expect. Informit has a fabulous fifteen things Google knows, and it's fascinating. Here's one:
Google Knows Mathematical Constants
In addition to performing calculations, Google also knows a variety of mathematical and scientific constants, such as pi, Avogadro's Number, and Planck's Constant. It also knows the radius of the Earth, the mass of the sun, the speed of light, the gravitational constant, and a lot more.
For example, if you're not sure what the value of pi is, just enter pi into the Search box and press Enter; Google returns 3.14159265, as it should. How about the speed of light? Enter speed of light, and Google returns 299,792,458 m/s. It's amazing what Google knows.
They're not search results they're talking about, either. Search results are displayed on the page, but the answer you seek is at the top of the page in plain language.
I took a shot with Yahoo too, and a lot of them work there as well.
Informit asked the answer to life, the universe, and everything. Google knew.
Try it out the whole list, it's a blast!