Since the earliest days of flight and space travel, scientists have worked with animals to pave the way for human exploration. In 1783, a rooster, a duck, and a sheep were placed in a hot-air balloon, becoming the first living creatures to fly in an artificial vehicle. Since 1949, when a monkey became the first animal to reach space, many creatures followed, and most returned safely to Earth. Many experiments were designed by high-school students. From cats and dogs to chimpanzees, spiders, frogs, and even a colony of honeybees, this book tells the fascinating stories of 50 space missions featuring pioneering animals at the forefront of science.