Encyclopedias, Almanacs, Transcripts, and Maps
- Remipedia (Remipedes)
- Ren and Yi
- Renaissance architecture
- Renaissance art
- Renaissance music
- Renew America
- Renewable Energy
- Renewable Energy
- Renewable Natural Resources Foundation
- Rennyo
- Renou, Louis
- Reproduction, Development, and Life History
- Reproduction, Development, and Life History
- Reproductive Processes
- Reptiles and Humans
- Republic of the Congo
- Reserve Mining Corporation
- Reserves and Resources
- Reshef
- Residential Water Use