The site offers 200 million pages of authoritative U.
Infoplease is not just a one of the best deep web search engines, but it also has additional tools such as a Calculator, Spell Checker, Place, Finder, Periodic Table, Conversion Tool, Distance Calculator, Fact Monster, and a Perpetual Calendar.
Besides the traditional things such as news, images, purchases, etc.
You can either use the site to know more about U.
This dark search engine is not the most popular one out there but can say it was the first one of its kind.