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.

    She wrote a blog that called attention to what was happening in her beautiful corner of Pakistan and realized that words can bring about change. She has continued to speak out for the right of all children to have an education. In 2014 she won the Nobel Peace Prize.

    The series now features a refreshed design, taking the series' original look in a more modern direction. DK Biography: Thomas Edison tells the story of the famous inventor, from his childhood as an -addled- student, to his reign as the -Wizard of Menlo Park, - where he developed the electric light bulb, the phonograph, and many other inventions still in use today.Supports the Common Core State Standards.

    And despite his father's efforts to turn young Darwin — a poor student — into a doctor or clergyman, the born naturalist jumped instead at the chance to sail around South America, observing and collecting flora and fauna all the way. In a clear, engaging narration, Kathryn Lasky takes readers along on Darwin's journey, from his discovery of seashells on mountaintops that revealed geological changes to his observations of variations in plants and animals, suggesting that all living things are evolving over time. Matthew Trueman's striking mixed-media illustrations include actual objects found in nature, enhancing this compelling look at the man behind the bold theory that would change the way we think about the world — and ourselves.

    Born in Pisa, Italy, in the sixteenth century, Galileo contributed to the era's great rebirth of knowledge. He invented a telescope to observe the heavens. From there, not even the sky was the limit! He turned long-held notions about the universe topsy turvy with his support of a sun-centric solar system. Patricia Brennan Demuth offers a sympathetic portrait of a brilliant man who lived in a time when speaking scientific truth to those in power was still a dangerous proposition.

    When Jane was little, her father gave her a toy chimpanzee called "Jubilee" which sparked her early love of animals. As an adult, Jane traveled to Tanzania to study chimpanzees in a new way – by living with them in their habitat. This is how Jane made many discoveries that people had missed. With stylish and quirky illustrations and extra facts at the back, this empowering series celebrates the important life stories of wonderful women of the world. From designers and artists to scientists, all of them went on to achieve incredible things, yet all of them began life as a little child with a dream. These books make the lives of these role models accessible for children, providing a powerful message to inspire the next generation of outstanding people who will change the world!

    With more than 100 full-color photographs and illustrations and detailed sidebars, this entry in DK's acclaimed Biography series celebrate a pioneer who changed how the world is viewed: aviatrix Amelia Earhart.Supports the Common Core State Standards.

    Their creations are some of the most enduring (the windshield wiper) and best loved (the chocolate chip cookie). What inspired these women, and just how did they turn their ideas into realities?Features women inventors Ruth Wakefield, Mary Anderson, Stephanie Kwolek, Bette Nesmith Graham, Patsy O. Sherman, Ann Moore, Grace Murray Hopper, Margaret E. Knight, Jeanne Lee Crews, and Valerie L. Thomas, as well as young inventors ten-year-old Becky Schroeder and eleven-year-old Alexia Abernathy. Illustrated in vibrant collage by Caldecott Honor artist Melissa Sweet.

    Recreates the childhood of the woman traditionally remembered as the maker of the first American flag, which was secretly presented to General George Washington in Philadelphia in 1776.

    Now, a two-and-a-half-year-long museum exhibit of Tut’s treasures is touring major cities in the U.S., drawing record crowds. This Who Was . . . ? is complete with 100 black-and white illustrations and explains the life and times of this ancient Egyptian ruler, covering the story of the tomb’s discovery, as well as myths and so-called mummy curses.

    This is the fascinating story of the two inventors and aviation pioneers who never lost sight of their dream: to fly, and to soar higher!

    Anthony: Champions of Women's Rights is the next installment in the Childhood of Famous Americans series.Using simple language that beginning readers can understand, this lively, inspiring, and believable biography looks at the childhood of Susan B. Anthony, who grew up to fight for women's equality and the right to suffrage.

    The true story of the dedicated woman, Anne Sullivan Macy (April 14, 1866 – October 20, 1936), originally from Tewksbury, Massachusetts, who became Helen Keller's inspirational teacher and lifelong friend.

    This expertly researched, behind-the-scenes account of Laura’s life chronicles the real events that inspired her to write her stories, and also describes her life after the last Little House book ends.

    Navy!After touring a German submarine in the early 1940s, young Raye set her sights on becoming an engineer. Little did she know sexism and racial inequality would challenge that dream every step of the way, even keeping her greatest career accomplishment a secret for decades. Through it all, the gifted mathematician persisted--finally gaining her well-deserved title in history: a pioneer who changed the course of ship design forever.The Girl With a Mind for Math: The Story of Raye Montague is the third book in a riveting educational series about the inspiring lives of amazing scientists. In addition to the illustrated rhyming tale, you'll find a complete biography, fun facts, a colorful timeline of events, and even a note from Montague herself!