Budding roboticists will learn how to create working robot hands, hydraulic arms, sensors, solar-powered robots, light-seeking robots and more. A great way to get kids interested in STEM subjects (science, technology, engineering, and math), the activities encourage kids to use all their talents to come up with creative solutions to tricky problems and figure out how things work.

On June 10, 2003, a little rover named Spirit blasted off on a rocket headed for Mars. On July 7, 2003, a twin rover named Opportunity soared through the solar system with the same mission: to find out if Mars ever had water that could have supported life.A thrilling addition to the acclaimed Scientists in the Field series, The Mighty Mars Rovers tells the greatest space robot adventure of all time through the eyes-and heart-of Steven Squyres, professor of astronomy at Cornell University and lead scientist on the mission.

This suspenseful page-turner captures the hair-raising human emotions felt during the adventures with two tough rovers.

Travel through time with the maestros as they explore the amazing history of timekeeping!

Did you know that there is more than one calendar? While the most commonly used calendar was on the year 2000, the Jewish calendar said it was the year 5760, while the Muslim calendar said 1420 and the Chinese calendar said 4698. Why do these differences exist? How did ancient civilizations keep track of time? When and how were clocks first invented?

Find answers to all these questions and more in this incredible trip through history.

In a first for young readers, the Sibert medalist Catherine Thimmesh introduces the incredible talents of the paleoartist, whose work reanimates gone-but-never-forgotten dinosaurs in giant full-color paintings that are as strikingly beautiful as they aim to be scientifically accurate, down to the smallest detail. Follow a paleoartist through the scientific process of ascertaining the appearance of various dinosaurs from millions of years ago to learn how science, art, and imagination combine to bring us face-to-face with the past.

Explaining how the wind works, what windmills have contributed to the past, and why they offer environmental promise today as a source of clean, renewable energy, this revised and updated edition offers a glimpse into all the current and historical uses for wind power. Featuring new information on wind energy technology and wind farms, new photographs, and 24 wind-related activities-from keeping track of household energy use and conducting science experiments to cooking traditional meals and creating arts and crafts-this handy resource offers kids interested in the science of energy and green technologies an engaging, interactive, and contemporary overview of wind power.