Our search engine databases are not your normal "Google-like" search engines! Our library search engines provide full-text access to scientific, peer-reviewed, journals that are not typically found through regular web searching. Scientific journals are usually available only through purchase. They are locked behind paywalls - a secure system that only allows users who have paid for access to read that article. The library pays to access these articles so you don't have to.
The vast majority of scientific articles in our collection are primary research articles. However, we also have secondary sources (meta-analyses and reviews), as well as other types of journal content. Always double check what you're looking at, and if you have any questions about your sources please contact me!