The best search engine ever created. It started out as a small university project, and has up-scaled to this. And, C'mon guys, we all know it's really number one, not Yahoo. The only reason Yahoo is "Number One" is because everything is under a sub-domain, whereas Google makes new domains for nearly everything. So, truthfully, Google is number one, not Yahoo.
Google is almost the epicenter of the Internet, next to Yahoo! The search engines are pretty reliable but don't trust any sponsor links unless you absolutely know it's safe. Excellent site overall. Who dosen't trust Google?