Because there's some gross stuff out there...
Facts on File Health Reference Center
The Health Reference Center gives clear and comprehensive information on conditions and diseases, health and wellness, mental health, and the human body.
This is why employees must wash hands!
Facts on File Science Online
Science Online presents a broad range of scientific disciplines through extensive essays, videos, diagrams, definitions, biographies, and experiments.
Britannica School offers thousands of up-to-date, curated, and curriculum-relevant articles, images, videos, audio clips, primary sources, maps, research tools, recommended Web sites, and three separate encyclopedias.