Come explore true stories of the human adventure in space. Reading their histories and thoughts will help you experience the excitement, beauty, and joy of space exploration. Learn about the first humans to walk on the Moon, the ones who almost did not come back, and our long, strange relationship with Mars. Humans in Space is a must-read for English learners with an interest in the great adventure of traveling among the stars. The Big Ideas readers give you information and language to sound smart in English while improving your reading speed, comprehension, and fluency.