Scirus is a comprehensive, science specific search engine. I definitely suggest you check out the About Us  page, to learn more about why you would use Scirus – over say, Google. At its core are 410 million science websites that you can search via the search field on the main page!
To get started, just type in the keyword, topic, or scientific term you want to find more information on! Not only can you find science websites with the information, but you’ll also find peer reviewed articles.
The best part is that it filters out sites that aren’t science related, so you don’t have to go through non-related results. You get purely science results which means you can find the information you need faster!
This is a great search engine; I hope you’ll bookmark it today!