Salk scientists engineered a right-handed RNA enzyme (bottom left) that can combine left-handed RNA fragments (bottom right) to create a mirror image of itself. The new left-handed RNA enzyme (top ...

Fossils and evolution / P.D. Gingerich -- Biological extinction in terms of overadaptation / T. Hamada -- Revolutions and colonizations in the history of life / B. Halstead -- The genomic tag model ...

Norman Horowitz, a pioneer of the study of evolution through biochemical synthesis who conducted a search for life on Mars, died Wednesday at his home in Pasadena, Calif. He was 90. In 1965, he began ...

[v. 2.] Introduction : Carnivores and conservation biology / George B. Schaller -- pt. 1. Behavior. Ethics and the study of carnivores : doing science while respecting animals / Marc Bekoff and Dale ...