Katherine Roy

This nonfiction picture book follows an elephant's growth from a newborn calf to a full-grown adult in one of the most socially and structurally complex family groups on earth.-- Provided by publisher.

"From fish to mammals and plants to insects, every organism on Earth must reproduce, and the survival of each species--and of life itself--depends on this and on the diversity it creates. In this groundbreaking book, Katherine Roy distills the science of reproduction into its simplest components: organisms must meet, merge their DNA, and grow new individuals; and she thoughtfully highlights the astonishing variety of this process with examples from...

"Astronomer and astrophysicist Cecilia Payne was the first person to discover what burns at the heart of stars. But she didn't start out as the groundbreaking scientist she would eventually become. She started out as a girl full of curiosity, hoping one day to unlock the mysteries of the universe. With lyrical, evocative text by Kirsten W. Larson and extraordinary illustrations by award-winning illustrator Katherine Roy, this moving biography powerfully...

Describes the important jobs the rover Curiosity conducts on the inhospitable surface of Mars, from looking for water to sending back information to Earth.

Kit, Zander, and M. K. West are settling into their new lives as students at the Academy for the Exploratory Sciences when Kit finds another mysterious map left for him by their father, the brilliant, famous ? and presumed dead ? explorer Alexander West. Why did Alexander leave the maps behind, and why are government agents so determined to seize them? What is really going on in a mysterious and unknown stretch of the Caribbean, famous for its violent...

A beautifully illustrated look at the forces that help cities grow-and eventually cause their destruction-told through the stories of the great civilizations of ancient America. You may think you know all of the American cities. But, did you know that long before New York, Chicago, Los Angeles, or Boston ever appeared on the map-thousands of years before Europeans first colonized North America-other cities were here? They grew up, flourished, and...