Describes various scientific theories which explore the extinction of the dinosaurs.
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Franklyn M. Branley was the originator of the Let's-Read-and-Find-Out Science series and the author of close to 150 popular books about scientific topics for young readers of all ages. He was Astronomer Emeritus and former Chairman of the American Museum of Natural History-Hayden Planetarium.
PreSchool-Grade 2-- Branley tackles the mystery of what did in the dinosaurs in this addition to his popular science series. True to his intention, he provides a clear, easy-to-understand explanation of several possible causes for the dinosaurs' extinction. He includes disease, temperature change of the Earth, and even the idea that small animals devoured the dinosaurs' eggs as possible causes of death. About half the book is spent discussing the theory which claims that comet showers and the ensuing fires, ash, and dust killed the dinosaurs and their food sources. Simont's soft watercolor illustrations clearly depict, yet effectively tone down the ferocity of the subject matter for young readers. Although Branley states several times that no theory has yet been proven, the attention he gives to the comet/Nemesis theory implies it is a more valid, better-researched theory, as compared to the others which receive only a page or two of attention. He is also reluctant to question the theory; for example, how is it that mammals and some reptiles (such as turtles and alligators) survived the comet catastrophe, while dinosaurs and plants did not? Perhaps this is making a Tyrannosaurus out of a molehill, but implied messages can sometimes be as influential as obvious ones. --Cathryn A. Camper, Minneapolis Public Library
Copyright 1989 Reed Business Information, Inc.
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