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Book Review, © Copyright 1999, Jim Loy
The KT Boundary is a layer of rocks between the Cretaceous (last of the dinosaurs) and the Tertiary period (beginning of the age of mammals) 65 million years ago. A mass extinction of most life on earth, including the dinosaurs, occurred at this time. The author, and several other scientists, have cleared up the mystery. It was an asteroid or comet, and the resulting long winter from dust in the atmosphere that killed off most life. To bring home the magnitude of the disaster, the author speaks of "the last day of the Cretaceous," or "two seconds before the end of the Cretaceous." This was sudden. And they found the crater (Chicxulub), about a kilometer underground, in Mexico. This book is scientific detective work at its best.
Other books on the same subject are:
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