This book clearly explains the reason why dinosaurs were so successful for so long in spite of their giant sizes. Theories about carnivorous (and vicious looking!) dinosaurs being scavengers have been widely accepted by scientists because otherwise the giants would be far too big to move effectively about the planet. The author gives a much better explanation using concepts which elegantly apply to the scale of all land life, including birds, insects and plants over millions of years. Due to his findings he rejects conventional plate tectonics in favor of an expanding earth for compelling reasons which he explains clearly. Whether or not he is right, the questions he raises appear to be side-stepped by conventional theories and deserve a better explanation in light of this work.