Title: Mass extinctions
First published: 1986
Description: Explains various theories about how dramatic changes in the earth's surface could have caused periodic mass extinctions, with an emphasis on the disappearance of the dinosaurs.
Subjects: Comets, Iridium, Dinosaurs, Catastrophes (Geology), Extinction (Biology), Juvenile literature
LC classification: QE721.2.E97 L35 1986