PREHISTORIC ACTUAL SIZE

Following hot on the heels of Actual Size (2004), the author’s presentation of relative size in modern animals, is this exploration of size from the beginning of life to about 3 million years ago. Aside from the introductory and concluding animals, he presents creatures chronologically from the most ancient to the most modern, taking care to display representatives of the various divisions of the animal kingdom. Readers will see a one-millimeter dot representing a protozoan, the front third of a two-meter long millipede and a terrifying close-up of the teeth of the 14-meter-long Giganotosaurus, as well as various other critters. Jenkins’s usual stellar collages deliver the usual spectacular goods, depicting slimy skin and feathers with equal ease. The brief gloss for each animal—including when it lived and its size in both English and metric figures—is supplemented by backmatter that goes into greater depth; there is also a paragraph explaining how the artist arrived at the colors and textures he uses. A metric ruler on the back complements the English ruler on the front flyleaf, so budding scientists can measure both ways. (Picture book/nonfiction. 5-12)