In the thirteenth century, Sundiata overcame physical handicaps, social disgrace, and strong opposition to rule the West African trading empire of Mali.

    For thousands of years, humans believed that Earth was at the center of the Universe, but all of that changed in the 17th century. Astronomers like Nicolaus Copernicus, Galileo Galilei, Johannes Kepler, and Isaac Newton proposed the unthinkable theory that Earth and the other planets actually revolved around the Sun. This engaging book chronicles the beginning of the modern age of astronomy, then follows later discoveries, including NASA's current missions in space.

    Regarded as the world’s first geneticist, Mendel overcame poverty and obscurity to discover one of the fundamental aspects of genetic science: animals, plants, and people all inherit and pass down traits through the same process, following the same rules. Living the slow-paced, contemplative life of a friar, Gregor Mendel was able to conceive and put into practice his great experiment: growing multiple generations of peas. From observing yellow peas, green peas, smooth peas, and wrinkled peas, Mendel crafted his theory of heredity—years before scientists had any notion of genes. Children will be inspired by Gregor’s neverending search for knowledge, and his famous experiments are easy to understand as an introduction to genetics. F&P level: Q

    Galileo Galilei was just such a man--a genius--and the first to turn the telescope to the skies to map the heavens. In doing so, he offered objective evidence that the earth was not the fixed center of the universe but that it and all the other planets revolved around the sun. Galileo kept careful notes and made beautiful drawings of all that he observed. Through his telescope he brought the starts down to earth for everyone to see.By changing the way people saw the galaxy, Galileo was also changing the way they saw themselves and their place in the universe. This was very exciting, but to some to some it was deeply disturbing. Galileo has upset the harmonious view of heaven and earth that had been accepted since ancient times. He had turned the world upside down.In this amazing new book, Peter Sís employs the artist's lens to give us an extraordinary view of the life of Galileo Galilei. Sís tells his story in language as simple as a fairy tale, in pictures as rich and tightly woven as a tapestry, and in Galileo's own words, written more than 350 years ago and still resonant with truth. This title has Common Core connections.Starry Messenger is a 1997 Caldecott Honor Book.

    Worms help the fruit and vegetables we eat by loosening the soil and feeding the plants. Read and find out about these wiggling wonders! This Stage 2 LRFO lets readers know about all the important ways worms work to help the environment—and people! This nonfiction picture book is an excellent choice to share during homeschooling, in particular for children ages 5 to 7. It’s a fun way to learn to read and as a supplement for activity books for children.This is a Level 2 Let’s-Read-and-Find-Out Science title, which means the book explores more challenging concepts for children in the primary grades and supports the Common Core Learning Standards, Next Generation Science Standards, and the Science, Technology, Engineering, and Math (STEM) standards. Let’s-Read-and-Find-Out is the winner of the American Association for the Advancement of Science/Subaru Science Books & Films Prize for Outstanding Science Series.

    Lucky for us, award-winning book illustrator and political cartoonist David Catrow has taken the most important introduction in our country's history and made it easy to understand in a hilarious, inspiring new book.We the Kids follows three adorable youngsters and one remarkable dog as they get ready for a camping adventure in the great outdoors. What makes this adventure different is that it is told through the Preamble. Just as the historical document starts out with "We the People of the United States," we're introduced to the children and their energetic pooch friend, who is standing by with a gargantuan, overloaded backpack. As the Preamble goes on, then, so does the story: They find themselves forming a More Perfect Union by finding their camping site, promoting the General Welfare by telling stories around a campfire, and securing the blessings of Liberty by settling down for a good night's sleep -- all in the backyard under the watchful eyes of two parents. With bright watercolor illustrations and sweet, cartoonlike characters, Catrow provides an entertaining story that brings the Preamble to life. The dog's actions throughout the book are truly sidesplitting, but they also explain to young readers each line of the Preamble. A fun introduction from Catrow called "Big Words, Big Ideas.&quot and a line-by-line explanation of the Preamble add to the book's pleasures.For school reports and American holiday celebrations, this is one book young historians won't want to miss. (Matthew Warner)

    But do you know about the mathematical genius who made sure that Apollo 13 returned safely home?As a child, Katherine Johnson loved to count. She counted the steps on the road, the number of dishes and spoons she washed in the kitchen sink, everything! Boundless, curious, and excited by calculations, young Katherine longed to know as much as she could about math, about the universe.From Katherine's early beginnings as a gifted student to her heroic accomplishments as a prominent mathematician at NASA, this is the story of a groundbreaking American woman who not only calculated the course of moon landings but, in turn, saved lives and made enormous contributions to history.

    "Historically accurate; will attract competent primary-grade readers and will be equally suitable for less able readers in intermediate grades." —SLJ.1990 The USA Through Children's Books (ALA)Children's Books of 1989 (Library of Congress)1989 Children's Books (NY Public Library)

    Hailstones roll over Indian hillsides. Rain makes a river in Kenya.On the same day that it's icy cold in the Artic, it's foggy in Louisiana, sunny in Barbados, and blowing wild winds called willy-willies in Austrailia. In this poetic exploration of longitude and weather, with bright and detailed paintings of seventeen different places, Marilyn Singer and Frane Lessac show us what's happening from the poles to the equator-- all on the same day in March.Top 10 Science Books for Children 2000 (Booklist) and Notable Children's Trade Books in the Field of Social Studies 2001, National Council for SS & Child. Book Council

    It presents the important traditional content of mineralogy including crystallography, chemical bonding, controls on mineral structure, mineral stability, and crystal growth to provide a foundation that enables students to understand the nature and occurrence of minerals. Physical, optical, and X-ray powder diffraction techniques of mineral study are described in detail, and common chemical analytical methods are outlined as well. Detailed descriptions of over 100 common minerals are provided, and the geologic context within which these minerals occur is emphasized. Appendices provide tables and diagrams to help students with mineral identification, using both physical and optical properties. Numerous line drawings, photographs, and photomicrographs help make complex concepts understandable. Introduction to Mineralogy not only provides specific knowledge about minerals but also helps students develop the intellectual tools essential for a solid, scientific education. This comprehensive text is useful for undergraduate students in a wide range of mineralogy courses.

    Yum!The best part of a young child’s day is often opening a lunchbox and diving in. But how did all that delicious food get there? Who made the bread for the sandwich? What about the cheese inside? Who plucked the fruit? And where did the chocolate in that cookie get its start? From planting wheat to mixing flour into dough, climbing trees to machine-squeezing fruit, picking cocoa pods to stirring a vat of melted bliss, here is a clear, engaging look at the steps involved in producing some common foods. Healthy tips and a peek at basic food groups complete the menu.

      In the past few years, a handful of scientists have been in a race to explain a disturbing aspect of our universe: only 4 percent of it consists of the matter that makes up you, me, our books, and every planet, star, and galaxy. The rest—96 percent of the universe—is completely unknown.   Richard Panek tells the dramatic story of how scientists reached this conclusion, and what they’re doing to find this "dark" matter and an even more bizarre substance called dark energy. Based on in-depth, on-site reporting and hundreds of interviews—with everyone from Berkeley’s feisty Saul Perlmutter and Johns Hopkins’s meticulous Adam Riess to the quietly revolutionary Vera Rubin—the book offers an intimate portrait of the bitter rivalries and fruitful collaborations, the eureka moments and blind alleys, that have fueled their search, redefined science, and reinvented the universe.

    During their "classroom" chats, she not only teaches Peter about Arctic Hare and Antelope Jack but also tells him about such creatures as Flying Squirrel, Mountain Beaver, Pocket Gopher, Grasshopper Mouse, Silvery Bat, Mule Deer, and Grizzly Bear.Told with all the warmth and whimsy of Burgess's stories, this engaging book acquaints youngsters with many forms of wildlife and the animals' relationships with one another. The charming collection of entertaining tales is sure to transport today's young readers to the same captivating world of nature that delighted generations of children before them.

    When she spilled the milk, she was brought before the court for stealing. Because she could read, Molly escaped the typicalpunishment of death on the gallows. At the age of seventeen, the English dairymaid was exiled from her country and sentenced to work as an indentured servant in British Colonial America. Molly worked for a planter in Maryland for seven long years. Then she was given an ox hitched to a cart, some supplies-and her freedom. That a lone woman should stake land was unheard of. That she would marry an African slave was even more so. Yet Molly prospered, and with her husband Bannaky, she turned a one-room cabin in the wilderness into a thriving one hundred-acre farm. And one day she had the pleasure of writing her new grandson's name in her cherished Bible: Benjamin Banneker.

    In 1856, when Louis Pasteur first began studying microbes in rotten sugarbeet juice, he put into motion a chain of events that saved France's wine industry, and revolutionized medicine and biology.