Henrietta spent years measuring star positions and sizes from photographs taken by the telescope at the Harvard College Observatory, where she worked. After Henrietta observed that certain stars had a fixed pattern to their changes, her discovery made it possible for astronomers to measure greater and greater distances—leading to our present understanding of the vast size of the universe.An astronomer of her time called Henrietta Leavitt “one of the most important women ever to touch astronomy,” and another close associate said she had the “best mind at the Harvard Observatory.” Henrietta Leaveitt's story will inspire young women and aspiring scientists of all kinds and includes additional information about the solar system and astronomy.

    As an adult, she dives even deeper. Whether she's designing submersibles, swimming with the whales, or taking deep-water walks, Sylvia Earle has dedicated her life to learning more about what she calls "the blue heart of the planet." With stunningly detailed pictures of the wonders of the sea, Life in the Ocean tells the story of Sylvia's growing passion and how her ocean exploration and advocacy have made her known around the world. This picture book biography also includes an informative author's note that will motivate young environmentalists.Life in the Ocean is one of The Washington Post's Best Kids Books of 2012

    Readers young and old will devour this fete pour les yeux."Follow Julia Child—chef, author, and television personality—from her childhood in Pasadena, California, to her life as a spy in WWII, to the cooking classes she took in Paris, to the publication of Mastering the Art of French Cooking, to the funny moments of being a chef on TV. This is a comprehensive and enchanting picture book biography, told in many panels and jam-packed with lively, humorous, and child-friendly details. Young chefs and Julia Child fans will exclaim, "ooooh la la," about this book, which is as energetic and eccentric as the chef herself.

    Born the youngest daughter of a poor family in Hanover, Germany, she was scarred from smallpox, stunted from typhus and used by her parents as a scullery maid. But when her favorite brother, William, left for England, he took her with him. The siblings shared a passion for stars, and together they built the greatest telescope of their age, working tirelessly on star charts. Using their telescope, Caroline discovered fourteen nebulae and two galaxies, was the first woman to discover a comet, and became the first woman officially employed as a scientist by no less than the King of England! The information from the Herschels star catalogs is still used by space agencies today.

    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.

    When Marie was young, she was unable to go to college because she was a woman. But when she was older, her scientific work was respected around the world. Her discoveries of radium and polonium dramatically helped in the fight against cancer, and she went on to win the Nobel Prize for Physics! This moving book features stylish and quirky illustrations and extra facts at the back, including a biographical timeline with historical photos and a detailed profile of the scientist's life.Little People, BIG DREAMS is a best-selling series of books and educational games that explore the lives of outstanding people, from designers and artists to scientists and activists. All of them achieved incredible things, yet each began life as a child with a dream. This empowering series offers inspiring messages to children of all ages, in a range of formats. The board books are told in simple sentences, perfect for reading aloud to babies and toddlers. The hardcover versions present expanded stories for beginning readers. Boxed gift sets allow you to collect a selection of the books by theme. Paper dolls, learning cards, matching games, and other fun learning tools provide even more ways to make the lives of these role models accessible to children.Inspire the next generation of outstanding people who will change the world with Little People, BIG DREAMS!

    Back in the 1830s, who was a young blacksmith from Vermont, about to make his mark on American history? John Deere, that’s who!Who moved to Illinois, where farmers were struggling to plow through the thick, rich soil they called gumbo? Who tinkered and and tweaked and tested until he invented a steel plow that sliced into the prairie easy as you please?Long before the first tractor, who changed farming forever? John Deere, that’s who!Beautiful illustrations—including spectacular landscapes—reflect the time period and bring John Deere's remarkable story to life.

    The planet is full of millions of species of plants, birds, animals, and microbes, and every single one -- including us -- is part of a big, beautiful, complicated pattern. When humans interfere with parts of the pattern, by polluting the air and oceans, taking too much from the sea, and cutting down too many forests, animals and plants begin to disappear. What sort of world would it be if it went from having many types of living things to having just one? In a beautiful follow-up, the creators of the award-winning Tiny Creatures: The World of Microbes deliver an inspiring look at the extraordinary diversity of Earth's inhabitants -- and the importance of their preservation.

    a gleeful celebration." —Kirkus Reviews, starred reviewTheodore Roosevelt had a small problem. Her name was Alice. Alice Lee Roosevelt was hungry to go places, meet people, do things. Father called it "running riot." Alice called it "eating up the world." Whether she was entertaining important White House visitors with her pet snake or traveling the globe, Alice bucked convention and turned every new experience into an adventure!Brimming with affection and wit, this spirited biography gives readers a peek at family life inside the White House. Prose and pictures spring, gambol, and two-step across the pages to celebrate a maverick American heroine.

    A tiny leak could shoot pressurized water straight through the men like bullets! A single spark could cause their oxygen tanks to explode! No one had ever dived lower than a few hundred feet...and come back. But Otis and Will were determined to become the first people to see what the deep ocean looks like.This suspenseful story from acclaimed author Barb Rosenstock with mesmerizing watercolors by award-winning artist Katherine Roy will put you right in the middle of the spine-tingling, record-setting journey down, down into the deep.

    purple mountains’ majesty, mauvelous, jungle green, razzmatazz… What child doesn't love to hold a crayon in their hands?  But children didn't always have such magical boxes of crayons. Here’s the true story of an inventor who so loved nature’s vibrant colors that he found a way to bring the outside world to children – in a box for only a nickel!

    Jane didn’t have much opportunity to go to school but she read everything she could, including the books in her father’s study. And before long, she began to write her own stories, filled with funny, clever, and inventive characters.Today, Austen’s novels ― including Pride and Prejudice, Sense and Sensibility, and Emma ― are widely read around the world. She's recognized as one of the most important and influential writers of all time; about her J.K. Rowling has said, "Jane Austen is the pinnacle to which all authors aspire."

    Capturing an engineer’s creative vision and mind for detail, this fully illustrated picture book biography sheds light on how the American inventor George Ferris defied gravity and seemingly impossible odds to invent the world’s most iconic amusement park attraction, the Ferris wheel.     A fun, fact-filled text by Gibbs Davis combines with Gilbert Ford’s dazzling full-color illustrations to transport readers to the 1893 World’s Fair, where George Ferris and his big, wonderful wheel lifted passengers to the skies for the first time.

    A wasp that hunts beetles nearly twice its size. The lives of fascinating creatures such as these were unknown until one man introduced them to the world.Meet Jean-Henri Fabre, one of the most important naturalists of all time. As a boy in the French countryside, Henri spent hours watching insects. He dreamed of observing them in a new way: in their own habitats. What he discovered in pursuing that dream was shocking; these small, seemingly insignificant creatures led secret lives—lives of great drama!With its lively, lyrical text and richly detailed illustrations, this intriguing picture-book biography introduces the man who would forever change the way we look at insects, bringing to life the fascinating world of dazzling beetles, ferocious wasps, and other amazing small wonders that exist all around us.

    Maria Merian was only a child, but she disagreed. She watched carefully as caterpillars spun themselves cocoons, which opened to reveal summer birds, or butterflies and moths. Maria studied the whole life cycle of the summer birds, and documented what she learned in vibrant paintings.This is the story of one young girl who took the time to observe and learn, and in so doing disproved a theory that went all the way back to ancient Greece.