Encyclopedias, Almanacs, Transcripts, and Maps
- Porpoises: Phocoenidae
- Portugal Launches Age of Discovery
- Posidonius of Rhodes
- Positive Number
- Positive Number
- Positron, Discovery of
- Possums and Cuscuses: Phalangeridae
- Postel, Guillaume (ca. 1510-1581)
- Posthumanism
- Posthumous Letters
- Potassium Aluminum Sulfate
- Potassium Aluminum Sulfate
- Potassium Hydrogen Tartrate
- Potassium Hydrogen Tartrate
- Potawatomi Prophet
- Potoos: Nyctibiidae
- Pottenger, Maritha (1952-)
- Pottery Analysis
- Pottery Analysis
- Powder of Projection