Encyclopedias are a good place to find a topic overview or background information on your topic.
“Popular” information sources (TV, newspapers, radio, popular magazines) are rarely the best sources of science and engineering information as they
These can be good for alerting you to new developments that you can investigate further in more reputable, authoritative sources described in this guide.
This video, created by the North Carolina State University Libraries and under a Creative Commons license, presents a good overview of the research and peer-review processes.
Science and engineering databases are good sources for identifying articles on your specific topic.