by Eusebio Casanelles · tapa dura · ISBN 9788439539353
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«El Tiempo - El Reloj Mecánico» is the children's non-fiction book by Eusebio Casanelles, published by Planeta DeAgostini in hardcover (28 pages).
It explains how humanity learned to measure time: sundials only worked during the day, so more advanced systems were created, such as water clocks and the first mechanical clocks, up to today's highly accurate quartz clocks.
Number 8 of the Once Upon a Time... the Inventors collection, published in 1995, with text in Spanish.
Aimed at children and young readers interested in inventions and the history of technology.
