The Horn Book Guide

SCIENCE

Weston, Mark

Finding the Speed of Light: The 1679 Discovery That Dazzled the World

32 pp. | Tilbury | March, 2019 | Trade ISBN 978-0-88448-545-2 $17.95 | Ebook ISBN 978-0-88448-547-6

(3) 4-6 Illustrated by Rebecca Evans. Growing up in seventeenth-century Denmark, Ole Romer wondered why lightning appeared before thunder sounded. Later, as an astronomer in Paris, Romer's observations of Jupiter's moon (Io) led him to calculate the speed of light. Dense scientific information is lightened by comic-panel illustrations with speech-bubble jokes about ice cream, plumbing, and butts. Budding scientists will enjoy learning the slow process of scientific discovery. Timeline.

Reviewer: Janet Dawson