The Sixth Extinction: An Unnatural History

Recherches sur les ossemons fossiles (Cuvier)
recolonization
reefs, ancient. See also coral reefs
Reich, David
Reinhart, Paul
relaxation
reproductive rate
reptiles, endangered
Reserve 1202
Rettenmeyer, Carl
Rettenmeyer, Marian
Revkin, Andrew
Reykjanes Peninsula
rhinoceros
black
Indian
Javan
Sumatran (Dicerorhinus sumatrensis)
white
woolly
Ricciardi, Anthony
Ridgwell, Andy
Riebesell, Ulf
Río Luján skeleton
river diversion
Roth, Terri
Rudwick, Martin
Sagan, Carl
salamanders
giant
Saltasaurus genus
Samways, Michael
Sandgathe, Dennis
San Diego Zoo
Sarpa salpa
saturation state
Saurolophus genus