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.

     After receiving a stuffed animal chimpanzee for her first birthday, Jane Goodall's love of animals only grew. She saw what humans and animals had in common, not what makes us different, and used that to advocate for animal rights everywhere, becoming famous for her work with chimpanzees.This friendly, fun biography series inspired the PBS Kids TV show Xavier Riddle and the Secret Museum. One great role model at a time, these books encourage kids to dream big. Included in each book are:- A timeline of key events in the hero's history - Photos that bring the story more fully to life - Comic-book-style illustrations that are irresistibly adorable - Childhood moments that influenced the hero - Facts that make great conversation-starters - A character trait that made the person heroic and that readers can aspire toYou'll want to collect each book in this dynamic, informative series!

    But after school, no one can stop her--and she's free to run endless miles to her heart's content. She is told no yet again when she tries to enter the Boston Marathon in 1966, because the officials claim that it's a man's race and that women are just not capable of running such a long distance. So what does Bobbi do? She bravely sets out to prove the naysayers wrong and show the world just what a girl can do.

    While other girls played with dolls, Joan preferred the company of reptiles. She carried her favorite lizard with her everywhere--she even brought a crocodile to school!When Joan grew older, she became the Curator of Reptiles at the British Museum. She went on to design the Reptile House at the London Zoo, including a home for the rumored-to-be-vicious komodo dragons. There, just like when she was a little girl, Joan hosted children's tea parties--with her komodo dragon as the guest of honor.With a lively text and vibrant illustrations, scientist and writer Patricia Valdez and illustrator Felicita Sala bring to life Joan Procter's inspiring story of passion and determination.

    Her unique sense of fashion, her grace, and, most important, her spirit made her beloved by generations. But her life offscreen was even more luminous. As a little girl growing up in Nazi-occupied Europe, she learned early on that true kindness is the greatest measure of a person—and it was a lesson she embodied as she became one of the first actresses to use her celebrity to shine a light on the impoverished children of the world through her work with UNICEF.This is Audrey Hepburn as a little girl, an actress, an icon, an inspiration; this is Audrey just being Audrey.

    But she would have noticed you. Jane watched and listened to all the things people around her did and said and locked those observations away for safekeeping.Jane also loved to read. She devoured everything in her father’s massive library, and before long she began creating her own stories. In her time, the most popular books were grand adventures and romances, but Jane wanted to go her own way . . . and went on to invent an entirely new kind of novel.Deborah Hopkinson and Qin Leng have collaborated on a gorgeous tribute to an independent thinker who turned ordinary life into extraordinary stories and created a body of work that has delighted and inspired readers for generations.

    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 her mom died, Ann continued sewing dresses. It wasn't easy, especially when she went to design school and had to learn alone, segregated from the rest of the class. But the work she did set her spirit soaring, as evidenced in the clothes she made. Rarely credited, Ann Cole Lowe became "society's best kept secret." This beautiful picture book shines the spotlight on a figure who proved that with hard work and passion, any obstacles can be overcome.

    Artist. Rule-breaker. The vibrant and daring life of Marianne North.In 1882, Marianne North showed the gray city of London paintings of jaw-dropping greenery like they'd never seen before.As a self-taught artist and scientist, Marianne North subverted Victorian gender roles and advanced the field of botanical illustration. Her technique of painting specimens in their natural environment was groundbreaking. The legendary Charles Darwin was among her many supporters.Laurie Lawlor chronicles North's life, from her restrictive childhood to her wild world travels to the opening of the Marianne North Gallery at Kew Gardens to her death in 1890. The North gallery at Kew Gardens remains open to the public today.

    Follow Jane from her childhood in London watching a robin on her windowsill, to her years in the African forests of Gombe, Tanzania, invited by brilliant scientist Louis Leakey to observe chimps, to her worldwide crusade to save these primates who are now in danger of extinction, and their habitat. Young animal lovers and Winter's many fans will welcome this fascinating and moving portrait of an extraordinary person and the animals to whom she has dedicated her life.The Watcher was named a Best Book of the Year by the Boston Globe, Kirkus Reviews, Booklist, and the Bank Street College of Education.

    That’s what everyone wonders when they see Niagara . . . How close will their courage let them get to it? At the turn of the nineteenth century, a retired sixty-two-year-old charm school instructor named Annie Edson Taylor, seeking fame and fortune, decided to do something that no one in the world had ever done before—she would go over Niagara Falls in a wooden barrel. Come meet the Queen of the Falls and witness with your own eyes her daring ride!

      When Wu Chien Shiung was born in China 100 years ago, most girls did not attend school; no one considered them as smart as boys. But her parents felt differently. Giving her a name meaning “Courageous Hero,” they encouraged her love of learning and science. This engaging biography follows Wu Chien Shiung as she battles sexism and racism to become what Newsweek magazine called the “Queen of Physics” for her work on beta decay. Along the way, she earned the admiration of famous scientists like Enrico Fermi and Robert Oppenheimer and became the first woman hired as an instructor by Princeton University, the first woman elected President of the American Physical Society, the first scientist to have an asteroid named after her when she was still alive, and many other honors.

    Spring after spring, year after year, she observed how all living things are connected. And as an adult, Rachel watched and listened as the natural world she loved so much began to fall silent. Spring After Spring traces Rachel’s journey as scientist and writer, speaking truth to an often hostile world through her book, and ultimately paving the way for the modern environmental movement.

    It was the first trip across an engineering marvel that had taken nearly fourteen years to construct. The woman's husband was the chief engineer, and he knew all about the dangerous new technique involved. The woman insisted she learn as well. When he fell ill mid-construction, her knowledge came in handy. She supervised every aspect of the project while he was bedridden, and she continued to learn about things only men were supposed to know:math,science,engineering.Women weren't supposed to be engineers. But this woman insisted she could do it all, and her hard work helped to create one of the most iconic landmarks in the world. This is the story of Emily Roebling, the secret engineer behind the Brooklyn Bridge, from author-illustrator Rachel Dougherty.

    Tutored by her father, the mathematician Theon, Hypatia quickly became an authority in the subjects of mathematics, astronomy, and philosophy. Word spread of her brilliance, and scholars from all over the world journeyed to Alexandria to seek her teachings.