This Google Custom search engine performs a search on websites that have been evaluated for their usefulness in providing data and statistics. Results will open in a new window.
Below are links to other pages that may be of interest to you.
The web sites listed below have Natural Sciences-related information. Please note that in some instances you may have to pay for the data. Also, this list is not meant to be exhaustive; it lists the more commonly used and useful sites. You may find the Google Custom Search useful in searching these sites as well as others.